Hi, I have a 1997 V6 that I just picked up. I got it running and notice it was idling terribly. I decided to try and take it down the street and noticed it wouldn’t accelerate, or even go over 3,000rpms. Tested the fuel pressure and it was about 42psi. I noticed there looks like what should be a vacuum hose that should be coming off of the throttle body and I believe it to be going to the purge solenoid on the passenger side engine area. I was just wondering if that’d cause the problems I’m having, and if anyone knows what size vacuum lines I’d need because from what I think I’ve seen it looks like the hose starts out big and then gets smaller right before entering the purge solenoid. Thanks for any help in advanced and maybe any pictures from what your throttle body vacuum line runs into would help a lot!

 

Update, I got the little boot connecting the throttle body to the purge control solenoid and still same issue. Car will rev up while idling but when put into drive will hesitate and not go over 3,000 RPMS and then stall as soon as I start to slow down. Noticed the oil pressure is at 0 except when accelerating so I'm thinking maybe something related to that.

 

Have you scanned it for codes?

Under what conditions was the fuel pressure 42 PSI - at idle (with or without the vacuum compensation line attached to the fuel pressure regulator), while being driven at moderate loads, or under max throttle/RPM?

One thing that will limit power and RPM is a plugged catalytic converter..

The idle surge may be connected to problems with the crankshaft and cam position sensors.

Do you mean oil pressure is 0 at idle, but increases with engine RPM? Check with a mechanical gauge. Idling with no pressure and low pressure when driving can destroy the bearings.

 

I can't get it scanned for codes because it's stalling and I can't get it uptown and don't have a personal scanner. I noticed the car had 42 PSI from the fuel only at idle, it was only connected the the valve on the fuel rail. I noticed I don't have a fuse on my air pump. Went to put one in and it seemed as if it wasn't plugging into anything, and no metal prongs to insert said fuse into it, so I'm thinking maybe the catalytic as the problem but haven't tested yet. As for the oil pressure I was just watching the gauge and at idle in park it'd be showing nothing. When revving the engine or bringing up the rpms it'd look like its building oil pressure but the second you stopped revving according to the gauge it'd drop.