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!995 22-RE engine idles about 1500 rpm Have backed off on both screws on the throttle body and still won't idle.

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CHeck for loose vacuum lines. At times spraying carb cleaner or cleaning the carb before adjusting helps. Check the idle up, you may have do do some adjustments. Check also the timing.

Posted on May 17, 2011

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I have a 95 1500 with the 350, sometimes it starts and runs great, other times right after it starts it will shoot up to 2000 rpm, the service engin soon light comes on and if you drive it, everytime you...


Try removing and cleaning the idle control solenoid on the throttle body. They get contaminated with carbon build-up and gives you an erratic idle. It's the round solenoid that screws into the side of the throttle body. When you remove it you'll see a spring loaded plunger that needs cleaning with throttle body cleaner and you'll need to clean the seat inside the throttle body as well.12_24_2012_2_14_19_pm.png

Dec 24, 2012 | 1995 GMC Sierra

1 Answer

Run away vehicle-99 chevy blazer wants to accelerate to 1500 rpm,braking will bring idle back down. What's problem?


In most cases problems with idle speed involve the idle air control valve or a dirty throttle body. The computer controls idle speed by how much air is allowed into the intake thru the control valve.
If the throttle is not sticking, I would check the valve and the bore of the throttle body.
You could also have a vac leak but that would usually be a constant problem.

Sep 19, 2012 | 1999 Chevrolet Blazer

1 Answer

Car won't pull back speed when foot off accelerator


Very possibly a vacuum issue. Maybe a line that needs vacuum for the trans is on an inlet that effects the throttle. Not sure how old your vehicle is.

Aug 23, 2012 | Jaguar Cars & Trucks

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How to Adjust idle RPM for a 2003 honda accord. some people were talking about a screw on the throttle body. but I can't find that screw. How do you go with adjusting this and where to find it ?


First, you shouldn't adjust the idle. If the idle isn't correct, that means there is an issue somewhere - not that the idle needs to be adjusted.

There isn't an adjustment screw. To adjust the idle, you will need to move the TPS (Throttle Position Sensor) forwards or backward. To do this, you will need to remove the tamper proof bolt and replace it with one that can be loosened and tightened.

Mar 04, 2012 | 2003 Honda Accord

1 Answer

How to Adjust idle RPM for a 2003 honda accord. some people were talking about a screw on the throttle body. but I can't find that screw. How do you go with adjusting this and where to find it ?


There isn't an adjustment screw that you really manipulate. The computer dynamically controls the throttle using the information it gets from the throttle positioning sensor (TPS) on the throttle body. The TPS is secured with tamper proof bolts that the head breaks off when torqued down. If you remove the throttle body and extract those bolts, then you can add bolts/screws with head and can be loosened and tightened. Then you can move the TPS back and forth to adjust the idle.

I wouldn't recommend doing this though: if there is and issue with the idle, it is because something is malfunctioning, not because it needs to be adjusted.

Mar 04, 2012 | 2006 Honda Accord

1 Answer

I have a 1992 E350 motorhome with a 7.5 in it. I just had to replace the fuel pump. After replacing the pump it idles rough and runs rich. I did pick up an engine light and after getting the codes...


There is a few options but first I am hoping with your fuel pump replacement that you replaced the fuel filter if not do it first.
next have you checked you throttle body idle speed control device... See below on diagnostics
The curb and fast idle speeds are controlled by the Engine Control Assembly (ECA) and the Idle Speed Control Bypass Air Valve (ISC-BPA) . The ISC-BPA valve is not adjustable. A large increase or decrease in closed plate airflow from the calibrated level will not allow this device to control the speed.
The idle speed setting procedure has been revised considerably to reflect the expanded application of the Self-Test idle speed options and because the throttle body incorporates an orifice in the throttle plate to control idle airflow as part of the sludge tolerant design.
dak408_14.gif

Throttle bodies with sludge tolerant design are clearly identified with a Yellow/Black decal. This decal warns that the throttle plate stop screw must not be adjusted counterclockwise (backed off), as this will not reduce the engine speed but may cause the throttle plate to stick in the bore. Backing out the screw may be required if the throttle body has been previously serviced (a plug in the throttle plate orifice may be present) or the plate stop screw tampered with (TPS Self-Test output out of range). The decal also warns that the throttle body must NOT be cleaned inside the bore, as this cleaning will impair the sensitive coating. The sludge accumulation will not affect the idle air flow. The cleaning procedure for the ISC-BPA still applies.

REMEMBER
A change in idle airflow can occur not only at the throttle body but other areas as well. You should enter the idle speed procedure only after other possible causes in the following areas are eliminated.
  • Contamination within the idle speed control device
  • Lack of fuel system control (excessively rich or lean)
  • Throttle sticking or binding
  • Engine not reaching operating temperature
  • Incorrect ignition timing
  • Incorrect or clogged PCV system
  • Vacuum leaks (intake manifold, vacuum hoses, vacuum reservoirs, power brake booster etc.
VERIFY

  • Transmission is in PARK (A/T), or NEUTRAL (M/T)
  • Parking brake is applied (automatic brake disconnected where applicable)
  • Wheels blocked
  • Engine at operating temperature
  • Proper fuel pressure and no exhaust smoke
  • Correct and clean PCV system
  • Heater, A/C, and other accessories OFF
  • Ignition timing is set to specification
  • EEC-IV diagnostics have been performed and vehicle malfunction indicated service output codes have been resolved.
STEP 1
With the engine OFF, connect a tachometer, according to manufacturer's instructions. Disconnect the negative (-) terminal of the battery for 5 minutes, then reconnect it.
STEP 2
START the engine and let stabilize for two minutes. Goose the accelerator and let the engine return to idle. Lightly depress and release the accelerator, then let the engine idle.
STEP 3
If the engine is not idling properly, turn the engine OFF, and proceed with this procedure.
STEP 4
Disconnect Idle Speed Control Air Bypass Solenoid.
STEP 5
START and RUN the engine at 2500 rpm for 30 seconds.
STEP 6
Place the transmission in PARK (A/T), or NEUTRAL (M/T).
STEP 7
Using a tachometer, verify the idle speed is at 650 +/-150 rpm.
dak408_15.gif


NOTE: A plug in the throttle body orifice will decrease idle rpm. Where as an orifice without a plug will increase idle rpm. Orifice plugs and installation tools are available in service kit # FOPZ-9F652-A.

RPM TOO LOW
  1. DO NOT clean the throttle body, check the plate orifice plug.
    • If there is no plug, turn the screw clockwise to the desired rpm.
    • If there is a plug from previous service, remove the plug, then adjust the screw in either direction as required. Screw must be in contact with the lever pad after adjustment.
RPM TOO HIGH
  1. Turn the engine OFF.
  2. Disconnect air cleaner hose.
  3. Temporarily block the orifice in the throttle plate with tape. If the orifice already has a plug from previous service proceed to Step (e).
  4. RESTART the engine. Check the idle speed, using a tachometer. NOTE: On vehicles with Mass Air Flow Sensors, reconnect the air intake duct hose prior to rechecking the rpm. If the engine stalls, crack open the throttle plate stop screw, but DO NOT over adjust.
  5. If rpm continues to be fast, perform KOEO Self-Test.
    • If TPS output code is within range, remove tape from throttle body and check for other possible causes.
    • If TPS output is out of range, adjust screw for proper TPS code. Lever must be in contact with the screw.
    • If rpm is still fast, terminate the procedure and check for other possible causes.
  1. If rpm drops to 650 rpm or lower, or the engine stalls, turn the engine OFF, disconnect the air cleaner hose, and remove the tape from throttle plate.
  2. Install an orifice plug with proper color code according to the throttle plate orifice size.
  3. Reconnect the air cleaner hose. START the engine, and check the idle rpm using a tachometer. Turn the throttle plate stop screw clockwise until an idle speed of 650 +/- 25 rpm is achieved. NOTE: DO NOT turn the plate stop screw counterclockwise. This may cause the throttle plate to stick at idle.
STEP 8
Run the KOEO Self-Test for proper TPS code output.
STEP 9
Reconnect the Idle Speed Control Air Bypass Solenoid. Verify the throttle is not sticking in the bore, and the linkage is not preventing throttle from closing.
STEP 10
START the engine and idle for two minutes. Goose the accelerator and let the engine return to idle. Lightly depress and release the accelerator, then let engine idle.

PROCEDURES FOR PLUG INSTALLATION

STEP 1
Remove air inlet tube(s) from throttle body.
dak408_16.gif STEP 2
Select the proper color plug by using the Go/No-Go gauge pegs, included in the service kit (FOPZ-9F652-A).
STEP 3
Starting with the largest diameter gauge peg, attempt to insert through the throttle plate orifice.
STEP 4
If the gauge peg goes through the orifice, use the corresponding color plug.
If the gauge peg does not go through, proceed with the next smaller gauge peg for Go/No-Go Test.
NOTE: It is important that the largest Go/No-Go combination is used to determine the proper plug size.
STEP 5
If the smallest gauge peg does not go through the orifice, use the reamer bit and handle included with the service kit to enlarge the plate orifice. Wipe bearing grease on both sides of the plate orifice and on the reamer bit to hold the brass chips. After reaming, wipe plate clean and then return to Step 3 to determine the proper plug size.
STEP 6
Using the installation tool from the service kit, push the plug into the orifice until bottoming out at the throttle plate.
STEP 7
Open and snap closed the throttle several times to verify proper plug retention.
STEP 8
Reconnect the air inlet tube(s).
STEP 9
Reset idle rpm per engine requirement using the throttle plate stop screw.


Hope this helps

Nov 11, 2010 | 1992 Ford F250

3 Answers

Idle at 250 rpm


Idle Speed Control (ISC) Motor OPERATION Eagle Throttle Body Fuel Injection (TBI) System NOTE: The Eagle TBI system is used only on 2.5L Premier engines. The Idle Speed Control (ISC) motor is mounted to the throttle body and controlled by the PCM. The throttle lever rests against the initial adjustment screw of the actuator (plunger). The idle speed is not adjustable. The initial adjustment screw is only used to establish the initial positioning of the actuator when the ISC motor has been replaced. The actuator extends or retracts to control engine idle speed and to set throttle stop angle during deceleration. Based on inputs from the various engine control system sensors and switches to the PCM supplies current to the ISC motor to adjust the actuator position for the particular operating conditions.
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Aug 05, 2010 | 1995 Dodge Spirit

3 Answers

1992 chevy blazer idols too low when engine is cold it idols around 800 rpm but when it warms up it drops down to around 400 rpm n alittle lower when i put it in gear


The problem is in the idle air control motor. It is mounted on the throttle body with two bolts, you can pull it off and make sure it is not caked with carbon also check where it mounts on the throttle body and make sure it is not caked with carbon.

Sep 13, 2009 | 1992 Chevrolet S-10 Blazer

4 Answers

Will not hold idle, runs fine at speed


check your Idle air valve thats what keeps your car with the right air mixture or check you idle screw for proper rpms usually they are under 1000 rpm 950 around there but i suspect it might be you air valve sensor the idle screw usually dont get outof adustment because if set from factory but is something you can look at

Aug 02, 2009 | 2000 Dodge Ram 1500 Truck

1 Answer

Idles up and down after warm, but goes away in reverse and drive. 1993 honda accord


I had the same problem with my honda. On the throttle body there is a screw that controls idle speed. If your idle speed is around 800-1000 rpm in neutral, tighten the screw a quarter turn each try until the idle speed is around 1500 RPM. Did this stop the idle?

Apr 09, 2009 | 1993 Honda Civic 4 Door

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