Question about 1996 Pontiac Grand Am

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Car turns over but wont fire

Already checked fuel pump and ign mod and coil packs. ran diagnostic scanner and came up with circuit low input for maf or vaf a, and map/baro. also evap emission control sys malfunction.

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  • subwayroofer Nov 12, 2008

    im about to do the and see if it does the trick. thank you

  • Anonymous Mar 29, 2014

    map/baro circuit high input

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  • 275 Answers

You will have to replace the map sensor that is most likely the problem but im not sure what the circut low input is i need more details

Posted on Nov 12, 2008

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My 2001 Malibu has 3100 engine..turns over but not firing but getting gas..replaced crankshaft censor,camshaft censor,ignition control module,coil packs and theft light is not on.


Did you check for battery positive voltage at the pink wire at the ignition module , you have three connectors ,one with 4 an two with two wires , the one with pink an black ,that's power an ground . is there power an ground ? Which crankshaft position sensor did you replace , yours has two ! crank sensor A an crank sensor B . A is an input to the PCM - engine computer , B is an input to the ignition module .Does your check engine light come on when you turn on the key ? an go off when you crank the engine ? You tested for spark at the coil ? Pull two pull wires on same coil an crank over the engine , is there spark jumping from one terminal to the other ?
Engine Cranks But Does Not Run
Inspect for the following conditions:
?€¢
Mass air flow (MAF) is compared to a calculated mass air flow based upon the manifold absolute pressure (MAP), throttle position (TP), and engine RPM readings. A skewed or unresponsive MAP sensor at KEY ON will cause the predicted air flow value to be inaccurate. Compare MAP and TP sensor value to that of a known good vehicle.


?€¢
A faulty engine coolant temperature (ECT) sensor. Compare the ECT with intake air temperature (IAT) on a completely cool engine with a scan tool. The ECT should be within 3?°C (5?°F) of the IAT. If not, refer to DTC P0128 .


You need a scan tool to check this stuff !
1
Did you perform the Diagnostic System Check-Engine Controls?
--
Go to Step 2
Go to Diagnostic System Check - Engine Controls

2

  1. Turn ON the ignition, with the engine OFF.
  2. Observe the DTC information with a scan tool.
Does the scan tool display DTC P0101, P0123, P0230, P0601, P0602, P1626, P1630, or P1631?
--
Go to Diagnostic Trouble Code (DTC) List
Go to Step 3

3

  1. Turn ON the ignition, with the engine OFF.
  2. Inspect the following fuses for an open:
?€¢
F/P INJR


?€¢
ELEK IGN


?€¢
F/PMP

Did you find an open fuse?
--
Go to Step 10
Go to Step 4

4

  1. Attempt to start the engine.
  2. Monitor the engine RPM parameter while the engine is cranking with a scan tool.
Does the engine RPM parameter display cranking RPM?
--
Go to Step 5
Go to Electronic Ignition (EI) System Diagnosis
  1. Monitor the Cylinder 1-6 Injector Circuit Status parameter with a scan tool.
  2. Crank the engine.
Do all of the Cylinder Injector Circuit Status parameters display OK?
--
Go to Step 6
Go to Fuel Injector Circuit Diagnosis

6

Command the fuel pump ON with a scan tool.
Does the fuel pump turn ON?

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2004 Mazda Bravo 2.6 efi


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My 89 jeep cherokee won't. Start it will turn over


what motor? is the coil producing spark?? If so, check the fuel pressure, if the fuel pressure is low drop the tank, repace the pump and also replace the filter (located on the frame forward of the tank). If the coil is not producing spark, check for shorts or opens in the circuits as well as the IGN fuses. If there is NO fuel pressure at all check the fuel pump fuses and make sure the fuel pump is plugged in and there are no opens in the circuit

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98 chevy 1500 starts and then shuts right off have replaced fuel pump and filter ,crank sensor,cam sensor ,oil sen. coil,ign.mod and PCM


On some chevys the oil pressure sending unit closes the circuit to continue the fuel pump to run after start. In the event of a wreck ,the car stops running thus no oil pressure thus turns off power to the fuel pump .A safety to help prevent fires. When you first start the car, the computer turns on the fuel pump for about 20 seconds just enough time to start and allow the oil pressure sending unit to close the circuit to allow it to continue running. when the car car has NO oil pressure or the sending unit fails ,it will start then shut down..as many times as you try to start. replace the oil pressure sending unit and secure a good conection. Dan

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1988 chevy silverado wont fire. Already checked the ign mod next is the coil. What else might cause it not to fire?


internal parts of distributor body ...(hall effect generator/ pick up or rotor, cap contacts as they apply to your vehicle)

Oct 02, 2010 | 1988 Chevrolet Silverado 2500

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Car cranks but wont start. I have no power to the


well if spark quits fuel usaly will to computer will do this to stop cadilac converter from filling with fuel!and causeing a fire saftey feature!!!!okay disconect battery wait a couple of minutes reconect! turn key on postion do not start or crank!off then on until you hear a GRRRRunt that is your fuel pump that is what you should hear turn your head to the right towards back seet and once you hear it that means pump is good then crank it then spark should quit if the coil packs a r bad then you have your problem if so test for spark also if you have eng light on cut the case hook up obd 2 scan find the fault and fix THIS IS WHAT I WOULD DO CHEERS!

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96 old bravada multiple misfires


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May 29, 2009 | 1996 Oldsmobile Bravada

1 Answer

I have 3 codes that showed up in the computer of my 1995 Ford Windstar


Here is the first half of the codes look till you find the one you have
111 System PASS.
112 ACT sensor circuit grounded.
113 ACT sensor circuit open.
114 ACT sensor is out of Self-Test.
116 ECT sensor is out of Self-Test.
117 ECT sensor circuit grounded.
118 ECT sensor circuit open.
121 TP sensor is out of Self-Test.
122 TP sensor input is less than Self-Test minimum.
123 TP sensor input is greater than Self-Test maximum.
124 TP sensor input voltage is greater than expected.
125 TP sensor input voltage is less than expected.
128 MAP vacuum hose damaged or disconnected.
129 Insufficient MAF input.
136 HEGO sensor circuit indicates system lean (Right HEGO).
137 HEGO sensor circuit indicates system rich (Right HEGO).
139 No HEGO switching (Front Side).
141 Fuel system indicates lean.
144 No HEGO switching (Left Side).
157 MAF sensor circuit open.
158 MAF sensor shorted to power.
159 MAF sensor is out of Self-Test.
167 Insufficient TP input change.
171 Lack of HEGO switching (Rear Side).
172 HEGO sensor circuit indicates lean. (Rear Side).
173 HEGO sensor circuit indicates rich. (Rear Side).
174 Check for diluted engine oil.
175 Lack of HEGO switching (Front Side).
176 HEGO sensor circuit indicates lean. (Front Side).
177 HEGO sensor circuit indicates rich. (Front Side).
178 Check for diluted engine oil.
179 Fuel system at part throttle lean adaptive limit, system rich (Rear Side).
181 Fuel system at part throttle rich adaptive limit, system lean (Rear Side).
182 Fuel system at idle lean adaptive limit, system rich (Rear Side).
183 Fuel system at idle rich adaptive limit, system lean (Rear Side).
184 MAF sensor input voltage is greater than expected, in range.
185 MAF sensor input voltage is less than expected, in range.
186 Closed loop injector pulse width longer than expected.
187 Closed loop injector pulse width shorter than expected.
188 Fuel system at part throttle lean adaptive limit, system rich (Front Side).
189 Fuel system at part throttle rich adaptive limit, system lean (Front Side).
193 Flexible Fuel sensor circuit failure.
211 PIP circuit failure.
212 Loss of tachometer/IDM input.
213 EEC SPOUT circuit open.
214 CID circuit failure.
215 PCM detected coil 1 primary circuit failure.
216 PCM detected coil 2 primary circuit failure.
217 PCM detected coil 3 primary circuit failure.
218 Loss of ignition diagnostic monitor signal-left side.
219 Spark timing defaulted to 10 degrees, spark output circuit open.
221 Spark timing error.
222 Loss of ignition diagnostic monitor signal-right side.
223 Loss of dual plug inhibit control.
224 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
225 Knock not sensed during dynamic response test KOER.
226 Ignition diagnostic monitor signal not received.
232 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
238 PCM detected coil 4 primary circuit failure.
241 Ignition control module to PCM ignition diagnostic monitor pulse width transmission error.
244 Cylinder Identification circuit fault present when cylinder balance test requested.
311 Secondary air injection system inoperative during KOER self-test (bank #1).
312 Secondary air injection system misdirected during KOER self-test.
313 Secondary air injection system not bypassed during KOER self-test.
314 Secondary air injection system inoperative during KOER self-test (bank #2)
326 PFE sensor circuit voltage lower than expected.
327 PFE sensor circuit voltage below Self-Test minimum.
328 Exhaust gas recirculation valve position sensor closed voltage lower than expected.
332 Insufficient EGR flow.
334 Exhaust gas recirculation valve position sensor closed voltage higher than expected.
335 PFE sensor circuit voltage out of Self-Test range.
336 PFE sensor circuit voltage higher than expected.
337 PFE sensor circuit voltage above Self-Test maximum.
338 Engine coolant temperature lower than expected (thermostat test).
339 Engine coolant temperature higher than expected (thermostat test).
341 Octane adjust service pin open.
381 Frequent A/C clutch cycling.
411 Cannot control RPM during KOER low RPM check.
412 Cannot control RPM during KOER high RPM check.
415 Idle Air Control system at maximum adaptive lower limit.
416 Idle Air Control system at upper adaptive learning limit.
452 Insufficient input from VSS.
453 Servo leaking down.
454 Servo leaking.
455 Insufficient RPM increase.
456 Insufficient RPM decrease.
457 Speed control command switch(s) circuit not functioning.
458 Speed control command switch(s) stuck/circuit grounded.
459 Speed control ground circuit open.

Jan 15, 2009 | 2001 Ford Windstar

1 Answer

Follw-up


check the mass air flow sensor if still no spark check the coil packs for power if they dont have power check all fuses and relays if they are all fine look for a short

Nov 17, 2008 | 1996 Pontiac Grand Am

3 Answers

Engine stalls


your on the right route but also check egr valve

Jul 07, 2008 | 1989 Buick Century

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