Hi,
I recently posted here with issues of rough idling and with your help I was able to fix/solve the issue.
Alas I have a new issue, when the van is cold, it starts up fine, idles fine...etc BUT when I am at low idle moving at 40km/h with rpm at or around 1000 I seem to get random rev loses or jerks as if I would be letting go of gas peddle quickly for an instant. That started yesterday afternoon and was happening to me this morning driving into work. When I drove more aggressively there didn't seem to be any bumping in rpm.
I stopped for 5 mins while filling my gas and when I re-started the van, although the idle wasn't rough the van would stall if I didn't give it extra gas (eng temp mid way, thus warmed up). If I keep my foot on the gas peddle a bit and keep higher revs (in or at 1000 range) no problem, everything works fine. As soon as I put it in gear it wants to stall as well unless I am giving it gas (was pushing on both brake and gas at lights to prevent it from stalling). When I start moving everything works fine.
When I was having the rough idle issues a few weeks back I had cleaned everything I could, MAF, IAC, FILTERS...etc I even checked my TPS with an ohmmeter(checked TPS when it was cold not hot and checked it OUT of the van, there were no dead spots in the readings). There were no apparent vacuum leaks.
What fixed my rough idle was when I changed my plugs and wiring. (I had changed the coil a few months prior to that)
My best guess is the IAC or TPS but I always thought the IAC was for when the car was in PARK and the TPS took over once you were in gear. Perhaps when I cleaned it fixed bought me a bit more time...etc
Other then the stalling when the van is warmed up and the occasional rpm bumps the van seem to run smoothly at higher RPM. The bumps in RPM sound like the TPS but does the TPS control your idle in park as well? Thankfully the TPS and IAC are easy fixes
!!! Changing those plugs and wiring were a real bitch!
Any and all help would be appreciated.
Thanks,
Tim