B4 VR6 Idle RPM?

[The Guy 28540]

I have a 97 Passat VR6. It used to idle around 1000 when I first got it. Now I can't get it to idle above 750. Is this normal? Also when I am driving and shift into neutral the headlights dim until I rev the engine. Any thoughts?

[diagramOSC]

I thought normal idle speed for a b4 is stable around 450-800.. something like that.. I'll look in my bentley, its somewhere in there.

[izzo]

750 is about good, give or take an idea.

[SpaceHamster]

I agree with Izzo, somewhere around the 750 RPM mark. I remember when I first got my car I used to freak out thinking that my car was dying because the idle was below 1000 RPM. Is it a manual? I am pretty sure automatics idle at a higher RPM, so you may be used to that

[diagramOSC]

The one b4 auto wagon I drove (not mine) hovered about 900.


Mine idles at 600-700 (manual) I'm expecting it to idle about 750-800 once I replace air filter.

[The Guy 28540]

Yes it is a 5 speed. So the idle should not be the issue? I will start checking more of the wiring then. Thanks for all the help.

[The Guy 28540]

I am used to my 2.0 MKIV. It held a steady idle at 1000 rpm. Now it is just a yard ornament since someone ran a red light and totaled it last month. I am using the passat for a daily driver now. Just trying to work the bugs out until I can get the Golf going again.

[dewkie]

Could be a few differnt things. Small vacuum leak, gunked up t-body not closing, a faulty CTS can affect idle too.


Its prob something really simple

[The Guy 28540]

I have removed and cleaned the t-body, replaced the temp sensor, replaced the MAF, and checked for vacuum leaks. I appreciate the suggestions though. Next will be the O2 Sensors once I can afford them.

[dewkie]

Could be stuck throttle cable. Maybe the casing is worn. Put a couple drops of oil inside the casing and see if that helps