Question about Chevrolet C3500
If you can drain all the fuel and change all the fuel filters and add some conditioner as well it would appear the fuel is causing the problem.
Posted on Aug 21, 2010
The accelerator pump is not working. Remove the air cleaner top and with the engine OFF, If things are working properly, as you look down you should see a little gas squirt out If that doesn't happen, either the float level is way low, the accelerator pump needs rebuilding or adjusting, Vacuum leaks can cause this also, but check the pump first.If all this checked ok then,Accelerator Pedal Positioner sensor needs to be checked.The "drive by wire" accelerator pedal (APP) has a triple redundant circuit. When one is out, it may set a code but continue to run, but if two or more are out, the engine is only permitted to idle but it will not give any code in most cases. In your case also there are codes retrieved in diagnostic test and truck is running in idle.Consensus seems to say that it's probably a wiring or computer problem, i.e. the computer isn't reading any movement from the throttle pedal, either because the signal is getting lost before it gets to the computer, or the computer itself is just going haywire.
Thanks. Keep updated for any more query. You can rate this
solution and show your appreciation.
Posted on Aug 20, 2010
Have a look at AIT and MAF sensors and check idle air control valve. From description it looks like the mixture is too rich at cold, engine will shut down when you press the pedal because is flooding. The ones listed are the parts that can cause the problem.
Check also for vacuum leaks. A small vacuum leak may cause idling problems, particularly at cold, in that case mixture will be lean because the vacuum is svcking extra air into the mixture through the leak.
I think problem is IAC valve or IAT sensor.
Posted on Aug 19, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Sep 27, 2016 | 1997 Chevrolet Tahoe
Oct 14, 2015 | Cars & Trucks
Nov 08, 2013 | Cars & Trucks
Oct 29, 2012 | 2002 Nissan Xterra
Trouble Code: P1336
CKP Sensor System Variation Not Learned
Set the parking brake and block the drive wheels for safety. Verify the hood is closed. Read the trouble codes. If a code is set, refer to that code. Start the engine. Allow engine temperature to reach at least 158?F (70?C). Then key off. Select Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle. Apply the brake pedal firmly and verify the selector is in Park. Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates. Read the trouble codes and recheck for DTC P1336. If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.
Jul 24, 2012 | Chevrolet Express Cars & Trucks
Dec 30, 2009 | 2005 Kia Amanti
Mar 18, 2009 | 1994 Chevrolet Lumina APV
Nov 15, 2008 | 1991 Nissan Maxima
Oct 24, 2008 | 1986 Ford F 250
Oct 14, 2017 | 2001 Chevrolet Blazer
553 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: