Issues

[97burnout]

Sorry I haven't been around but have to ask for some help on this. So in the last several months during acceleration in my 97 3.8 there has been some studder, very randomly. Well the other day it did that during deceleration is studdered then died. Had it towed back home and will not start. I tried to scan it I didn't get a code but it said it wasn't getting a code from the o2 sensor and the egr valve. Any thoughts?

[Rob Bell]

Re: Issues

The studdering on deceleration could be a the EGR stuck in the open position. If it's not getting a signal from the O2 when cold, that could be expected because when the engine is cold it's in open-loop mode, and I think that means it ignores the O2's.

I would think it would still start, though, even with a bad EGR. It would just run like crap. Check for spark and then check the fuel pressure. I'll bet one of those is missing

[Brians00Blackbird]

Re: Issues

I agree with the fuel pressure. This would really suck, but it could be your fuel pump.

[97burnout]

Re: Issues

There is definitely spark. I was thinking fuel pump or filter. It seems like it just isn't getting fuel.

[Brians00Blackbird]

Re: Issues

Mine went when i was at a light in an intersection. I had studdering here and there and that day it went. I was at a stop and once i accelerated it studdered like a motha and boop, down for the count lol. Would not start up for anything. Expensive fix if that ends up being the problem. Id look into the method of removing it via cutting into the panel above the fuel pump. Otherwise you need to drop the fuel tank, which is not fun and a bit of work. That is of course, if its your fuel pump

[Meatyshells]

Re: Issues

kind of sounds like the fuel pump. Mine went out at around 130k i think. Check the pressure at the rail, should be ~44psi

[97burnout]

Re: Issues

Going to take a fuel line out and see if fuel comes out when I try to start it. If it doesn't it is probably that.

[flamingchicken]

Re: Issues

Going to take a fuel line out and see if fuel comes out when I try to start it. If it doesn't it is probably that.

There is a shrader valve on the fuel rail on the passenger side, probably has a black cap on it. You can connect a guage to see what pressure is at the rail.

[97burnout]

Re: Issues

Got the car running with a new fuel pump but the car still loses power going up hills and at a certain rpm. So I figure I will replace the filter for good measure. Anyone know where it is at on my 97 v6?

[Docta]

Re: Issues

Should be along the line just in front of the driver rear tire. Just find the line at the tank, follow it.

[Cdr.Instigator]

Re: Issues

My 97 3.8 had the same problem and I spent more than 500 dollars trying to pin point the problem.. at the end it turned out to be a 35 dollar sensor..


It's right above the fly wheel, it's called the Crank shaft sensor..

[97burnout]

Re: Issues

Not sure about that because the fuel pump did get the car running. Now I just have power cut off during acceleration. It could be and thanks for the tip, so this is in the front of the engine? ....
I was also thinking the fuel pressure regulator.

[ssms5411]

Re: Issues

Hook up a manual fuel gauge off the fuel rail to see what PSI your reading.

[97burnout]

Re: Issues

Did that. Psi is good while running. About 45 Psi. But once you shut the engine off it falls to 0.

[ssms5411]

Re: Issues

It should bleed down to zero but not all at once.