Question about 1995 GMC Sierra C1500

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1995 GMC with 350 engine auto transmission idle to fast. Have replaced oxygen sensor, idle air control, and throttle potion value. can see butterfly values are closed when the engine is running at an idle have adjusted the butterfly values to the point were they sticking closed. Have closed off port for idle control air while engine was running this did not solve the problem. P.s The engine is getting more hesitant to start , but runs and preforms great. Larry Potts

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It sounds like you have a vacuum leak somewhere. Take a propane torch, turn on the gas but DON'T LIGHT IT!!! Start the vehicle and point the torch at any and all vacuum outlets and hoses. If the engine revs up slightly, you have found your leak. The vacuum will pull the propane into the engine causing it to rev. Check the throttle body mounting plate good and vacuum lines at the back of the engine and transmission. Hope this helps.

Posted on Apr 03, 2011

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I hooked my 95 Mazda mil up and says I need O2 sensor for bank 1 and 2 and also says I need engine speed circuit not sure wat to replace and wats really messd up please help


First is all always write down the codes you have present, it helps in closing down on the problem. I am assuming you have a 95 Mazda Milleinia

1. Start and run the engine and monitor the oxygen sensor signals and see if this sensor has bad readings still. Check for an open or shorted wire between the sensor and the Engine Control Module (ECM) if the signal is dropping out.

2. Listen for an exhaust leak in the area of the oxygen sensor, the leak could allow oxygen in to the exhaust and skew the sensor readings.

3. Inspect the ECM and ECM connector for signs of something that has been spilled on the ECM. Is the engine idling too high or too low then check this:-
1. Unplug the idle air control valve and turn the air bypass screw in to see if it will idle down. If it will idle down, adjust the idle speed to around 500 RPM's and then plug the idle air control valve back in.

2. If it still idles high, remove the air boot from the throttle body, block the air bypass ports with duct tape, hook the air boot back on and start it. This should make it not idle at all or just barley idle. If it does, the problem is in the idle air control valve.

3. If blocking the air ports doesn't cause it to idle down, the throttle plate must be sticking open. Clean the throttle plate really good and back the throttle stop screw off and then see if it idles down.

4. Verify the coolant level is not low and that coolant is circulating through the idle air control valve. Tech Tips: This idle air control valve is two valves in one. It is a fast idle thermo valve on one side and a duty cycle idle air control valve on the other.

Mar 30, 2015 | 1995 Mazda Millenia

1 Answer

What sensors does an 89 gmc sierra 350 have that effects idol and fuel?


Oxygen sensor on exhaust. Mass airflow sensor. Air/ idle control sensor. Throttle position sensor

May 08, 2014 | 1989 GMC Sierra

1 Answer

Motor runs at 4000 rmp when started


1995 Geo Metro. COLD start or HOT started or BOTH?
Does it ever idle down to 800 HOT? (engine temp)>?

Aka:
Geo Metro (later re-branded the Chevrolet Metro), Pontiac Firefly, and Suzuki Swift
which engine, what country???
I will post for USA only !!!!
Auto or stick tranny???
the USA 1995 was the last car to use TBI injection (throttle body)
the LSI option, then had a 4 cylinder. in 1.3Liters.
and works totally differ. than any 1.0L
answsering for 1.0L

Have you inserted the Diagnostic jumper wire and looked at the
FLASH codes yet?
choke? on 95? what country is this, ours are not carbs. in 1995.
so post country. ours are all EFI in USA.
3 cylinder? 1 liter? or which engine/?
on any USA Metro, 1L , when first started, it has 2 valves. to control IDLE, (cold , is iAC) hot is ISC, The cold start valve opens farther the colder it is (how cold was it). but usually is limited to about 2000 rpm
max.
this engine, TBI, uses a MAP to control fuel mixtures, and
any air leaks (aka; vacuum leaks) what so ever, will cause too fast idle.
so on MAP cars, you get to find out what is leaking AIR.
1995 has the new better , idle control speed motor, (ISC)
this can be stuck open.
that new TPS, did you do the calibration correctly?
it must set right. or idle will never be controlled.
finding the cause, takes hard work, and hands on testing
A/C fast idle broken
A/T transmission fast idle, device, broken.
Air leaks (add huge list of possibles and cracked hoses here)
Throttle stuck
ISC or IAC bad.
very hands on to find this, done many.
TPS on indexed corrrectly or not calibrated.

Jan 28, 2014 | 1995 Geo Metro

2 Answers

Hi i have a 1995 mazda 1.8 auto protege when i select drive or reverse the motor at idle almost cuts out or some times cuts out it dose not cot out if you turn the aircon on so it seems to me that the ecu...


There should be a line connecting the solenoid of the transmission to the ECU. It could be the wiring is bad or the contacts need cleaning or the IAC valve may need cleaning or is not working.

Jun 03, 2011 | 1995 Mazda Protege

1 Answer

Fast idle


Fast idle could be the result of a few things; however, I would start with your Idle Air Control (IAC) Value. This is is mounted on your car's throttle body and it controls your vevicles idle speed under various conditions. It is easy to access. Try cleaning your IAC. Even a little bit of carbon build up could impact your car's idle.

{Please remember to rate this solution - Thanks}

Jan 15, 2011 | 1995 GMC Sonoma

3 Answers

Check engine light comes on after approx. one minute. My code reader gives me a 214 in continuous memory ( cylinder ID circuit failure). I clear the code and it comes back. What is giving me this code?...


look 214 is not a valid code for a 1995 escort, this is an OBD1 system. here is a list of trouble codes for this year of ford no matter the model.

You should find the diagnostic connector under your hood normally by the fender on the battery side. By just using your test light and a jumper wire, it will tell you what kind of problem you got.

KEY ON ENGINE OFF (KOEO) TEST
Model years 1984-1995 all models of Ford
1. Make sure engine is fully warmed. If in doubt, run engine at 2000 rpm for 2 minutes.
2. Turn ignition off and wait 10 seconds for system to shut off. Make sure A/C is off and transmission is in Park (automatic) or Neutral (manual).
3. Hook up light and jumper (or a tester if you have one). Turn key to ON (do not start engine). Read the codes.

How to do it?

Example code 23: your test light should flash 2 long consecutive flashes followed by 3 short pulses.

Ford's common codes for OBD1 (vehicles made before 1995)

11 system pass
12 idle control fault
13 dc motor did not move
14 engine rpm signal fault or PIP circuit failure
15 eec processor or power to KAM interrupted
16 rpm to low to check oxygen sensor test or fuel control error
17 cfi fuel control system fault or rich/lean condition indicated
18 ignition diagnostic monitor (IDM) circuit failure
19 cylinder identification (CID) sensor input failure
21 engine coolant temperature (ECT) out of self-test range
22 manifold absolute pressure (MAP) sensor circuit out of range
23 throttle positioner sensor out of self-test range
24 air charge temperature (ACT) sensor out of self-test range
25 knock not sensed during dynamic response test
26 transmission fluid temperature out of self-test range
28 loss of primary tach, right side
29 insufficient input from vehicle speed sensor
31 egr positioner sensor below minimum voltage
32 egr positioner sensor below closed limit
33 throttle positioner sensor noisy/harsh on line
34 egr valve circuit out of self-test range
35 egr valve circuit above maximum voltage
38 idle track switch circuit open
39 axod torque converter or bypass clutch not applying properly
41 oxygen sensor circuit indicates system always lean
42 oxygen sensor circuit indicates system always rich
43 oxygen sensor out of self-test range
44 air injection control system failure
45 coil 1 primary circuit failure
46 coil primary circuit failure
47 4X4 switch is closed or oxygen sensor failure
48 coil primary circuit failure
49 electronic transmission shift error
51 engine coolant temperature sensor circuit open
52 power steering pressure switch circuit open
53 throttle position circuit above maximum voltage
54 air charge temperature circuit open
55 key power input to processor open circuit
56 mass air flow circuit above maximum voltage
57 axod circuit failure
58 idle tracking switch circuit fault
59 automatic transmission shift error
61 engine coolant temperature circuit grounded
62 converter clutch error
63 throttle positioner circuit below minimum voltage
64 air charge temperature circuit grounded
65 charging system over voltage
66 mass air flow sensor circuit below minimum voltage
67 neutral/drive switch circuit open
68 transmission fluid temperature over temperature range
69 transmission shift error
70 data circuit communication link circuit failure
71 message center circuit circuit failure
72 insufficient manifold absolute pressure (MAP) change during dynamic response test
73 insufficient throttle positioner (TPS) change during dynamic response test
74 brake on/off (BOO) circuit open
75 brake on/off (BOO) circuit closed
76 insufficient air flow output change during test
77 brief wide open throttle not sensed during test
78 power interrupt detected
79 a/c on/defrost on during self test
81 map has not changed normally
82 super charger bypass circuit failure
83 OIC-low speed fuel pump relay circuit failure
84 egr vacuum regulator (EVR) circuit failure
85 canister purge circuit failure
86 shift solenoid circuit failure
87 fuel pump circuit failure
88 electro drive fan circuit failure
89 transmission solenoid circuit failure
91 no oxygen sensor switching detected
92 shift solenoid circuit failure
93 throttle positioner sensor input low
94 torque converter clutch solenoid circuit failure
95 fuel pump secondary circuit failure
96 fuel pump secondary circuit failure
97 transmission indicator circuit failure
98 electronic pressure control circuit failure
99 eec has not learned to control idle

Jan 14, 2010 | 1995 Ford Escort

1 Answer

1995 k2500 suburban idle too fast


replace the coolant temp sensor,it`s values are off,it is defective.Also if this does not work,witch I think It will,change the throttle position sensor.

Nov 15, 2009 | 1995 GMC Suburban

1 Answer

High idle CHevy 350 TBI


check if went from a V6 TO V8 need power two more cylinders

Jun 20, 2009 | 1992 Chevrolet K1500

1 Answer

87 chevy truck with TBI idles too fast


Spray the intake with carb cleaner to find the vacuum leak. Check where the EGR mounts and the throttle body gasket sense you had both off.

May 10, 2009 | 1987 Chevrolet R20

2 Answers

Checking the fault codes


Yes.  Next to the ash tray there is a black slide off plate that reveals the OBD I plug.  {1996 and newer can be read with an OBD II reader (read for free at Advance auto or Auto Zone)}  Once you reveal this plug on the 1995, you can plug in a single jumper wire (or even a paper clip) in the #4 and #15 pin hole.  There are two rows of pin holes, count from the upper right to the #4, then on to #15 (which will be the second to last pin hole).  Turn the ignition switch on (motor not running), insert the jumper wire for about 3 to 5 seconds, then remove the wire.  The ENGINE LIGHT will flash a hold, then the code, which will go something like this, flash, flash, PAUSE, flash, flash, PAUSE, flash, PAUSE, flash, flash, flash, flash.  Then it will repeat the codes if you just sit there and observe it.  The code in my example would be a 2214 code.
Below are some code I found on a website.  I hope this helps.  Now I ask that you take the time to answer someone elses question.  Lets all share.  Good luck, "Peace through power and knowledge"

CODE FAULT
0000 End of fault sequence
1111 Bad ground to Electronic Control Unit (ECU) or ECU failure-check grounds or replace
ECU
1119 Transmission Range - Defective wiring. Check for break or short.
1213 Vehicle Speed Sensor (VSS) - Check transmission speed sender wiring and the wiring of
the instrument cluster
1231 Vehicle Speed Sensor (VSS) (G54) - Check transmission speed sender wiring and the
wiring of the instrument cluster
1232 Throttle Position Actuator - Check defective actuator or wiring for break or short.
2111 Engine speed sender. (RPM)
2112 Ignition reference sender
2113 Hall sender - No speed signal from distributor; check Hall sensor and circuits or the
Air-flow sensor plate is not moving freely; adjust potentiometer or lever.
2114 Hall sender not on reference point or distributor out of position.
2121 Idle switch - check switch & circuit.
2122 Hall sender - Check wiring for break or short.
2123 Full throttle switch; check switch & circuit.
2132 Electronic Control Module (ECM) - No ignition to injection signal.
2141 Knock sensor 1 control at maximum ****** - test compression, change octane, adjust
timing, check knock-sensor wires.
2142 Knock sensor 1 signal - Test sensor, check wiring for break or short.
2143 Knock sensor 2 control at maximum ****** - test compression, change octane, adjust
timing, check knock-sensor wires.
2144 Knock sensor 2 signal; test sensor.
2212 Throttle Potentiometer - Value out of range.
2214 RPM Signal - Idle speed to high or engine over-revved
2221 Vacuum Control - No vacuum to control unit. Check for leaks.
2222 Manifold Vacuum - Check vacuum line and wastegate for leaks.
Pressure sensor - Sensor defective
2223 Altitude Sensor - Check sensor, check wiring for break or short.
2224 Turbo/Manifold pressure - Check turbo control wiring, check for over boost, air leak,
defective wastegate valve, vacuum leak or defective pressure sensor.
2231 Idle-speed stabilizer adjustment limits exceeded; too-fast idle. Adjust throttle for full
closing, check for vacuum leak, check ignition timing.
Or
Air Mass Sensor - Check sensor and wiring.
2232 Air mass/flow sensor - No signal. Check wiring for break or short.
2233 Air mass/flow sensor reference voltage open or short circuit
2234 ECM Supply voltage low.
2242 CO-potentiometer voltage low
2312 Coolant temperature sensor - Check wiring, check resistance.
2314 Transmission to Engine control module circuit. - Check wires for breaks or shorts.
2322 Intake Air Temperature Sensor - Check sensor and wiring.
2323 Mass Airflow Sensor - Check sensor and wiring for breaks.
2324 Mass Airflow Sensor - Check sensor and wiring for breaks or shorts to B+ or ground or
check for air leak.
2331 Oxygen Sensor Control - Out of range. - Check ignition, air intake for leaks and injectors.
2332 Oxygen Sensor - Bank 2 - Check wiring for breaks or shorts.
2341 Oxygen sensor (O2) at control limit; check CO, lambda-sensor wire, lambda-sensor
control, start valve, evaporative system and check for vacuum leaks.
2342 Oxygen Sensor Control - no signal - Check wiring, sensor.
2343 Rich limit; the pressure regulator has exceeded +10 mA for more than 5 minutes,
closed-loop; check for vacuum leaks.
2344 Lean limit; the pressure actuator has exceeded -5mA for more than 5 minutes, closed
loop; check idle.
2411 EGR System Malfunction
2412 Intake Air Temperature Sensor - Check sensor and wiring for breaks or shorts
2413 Mixture Control - Running rich
Fuel pressure too low
3424 Malfunction Indicator Lamp (MIL) failure - Check lamp and wiring.
4311 Secondary Air Injection Pump Relay - Check relay and wiring.
4312 EGR Frequency Valve
4313 Secondary Air Injection Solenoid Valve - Check valve and wiring.
4331 EVAP Carbon Canister Solenoid Purge Valve 2
4332 Ignition Circuit Final Stage - Check for break or short to ground or B+ or bad ECM.
4343 EVAP Carbon Canister Solenoid Purge Valve 1
4411 Fuel Injector Cylinder 1 or 1 & 5
4412 Fuel Injector Cylinder 2 or 2 & 7
4413 Fuel Injector Cylinder 3 or 3 & 6
4414 Fuel Injector Cylinder 4 or 4 & 8
4421 Fuel Injector Cylinder 5
4422 Fuel Injector Cylinder 6
4423 Fuel Injector Cylinder 7
4424 Fuel Injector Cylinder 8
4431 Idle Air Control Valve / Idle Stabilizer - Check valve and wiring.
4433 Fuel Pump Relay
4442 Wastegate - Defective frequency valve or wiring.
Boost pressure circuit - Check for short.
4443 EVAP Canister purge valve.
4444 No fault in system.

Oct 17, 2008 | 1995 Volkswagen Jetta

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