Question about Cars & Trucks
Engine begins missing particularly between 2.5k and 3k rpms, surges when turning on/off brights and emergency lights, etc. Tried replacing map sensor and crank position sensor to no avail, it runs good the first few minutes after cranking, then gets worse until no fuel pressure. Battery reads somewhat low on voltmeter. Also, no signal at OBDII port.
Check altenator to see if charging.
Check fuel pump, replace if needed.Check Throttle positioning sensor, replace if needed.
Posted on Jan 21, 2013
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
crank shaft sen. is easy enough to change.its mounted near timing chain cover,cam sen.is somewhat harder,its in the distributor,id doubt that both are defect
Posted on Mar 10, 2009
I think you have ruled out the engine with all the parts you have replace. The transmission torque convertor is in lock up mode all the time. The engine is having to hard of a time to stay at the normal idle. The over drive clutches and soleniod are most likely damaged in the transmission.
I think you should take the vehicle to a trasnmission shop , The can check the torque convetror soleniods and pressure control soleniod.
The oil light coming on bothers me. I know you have the rebuilt engine in the vehicle but I think the oil pump in the engine is starting to go out or could be weak. The lower bearings connected to the crank shaft might be starting to leak. Have the oil pressure checked .
Posted on Mar 19, 2009
Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?
Posted on Dec 18, 2009
Tips for a great answer:
Feb 26, 2015 | 1987 Honda Prelude
Feb 08, 2014 | 1995 Buick LeSabre
Jan 03, 2014 | 1994 Jeep Cherokee
Sep 23, 2012 | 1996 Buick Skylark
Sep 06, 2009 | 1988 Ford Bronco II
May 25, 2009 | 1996 Pontiac Grand Am
May 18, 2017 | 2003 Chevrolet Silverado 1500
Apr 16, 2009 | 2001 Nissan Altima
Nov 29, 2008 | Chevrolet Cobalt Cars & Trucks
55 people viewed this question
Usually answered in minutes!