Engine Problems

[SonicRiot]

FreqSHO91... your problem sounds unrelated to this thread. Try another thread, post with more details.

Steve: has anyone suggested a vaccuum leak? Does it stall ONLY under braking? Perhaps the 02 were NOT bad and there was a vacuum leak telling the 02s that the mix was lean. What are your long-term fuel trim levels?

 

[stevemainian]

Theres a brand new water pump on there. It was replaced back in september. Although I now smell a slight odor of coolant when exiting the car that was not there before. You now have me thinking... But wouldnt that make the codes for the crank position sensor pop up?

We already checked for a vacuum leak. And wouldnt a vacuum leak cause constant stalling?

 

[stevemainian]

I was 90% sure it wasn't my DIS, but it was.
Check your CATs. If they are turning Red from running lean while it is running on 5 cyl, it's the DIS.

Borrow one from someone and see if it solves your problems. That's how I found it was my DIS.

TankII

My car is running on all cylinders.

 

[todras]

Did you install a new MAF yet? I want to know if this has any effect even though my car has no codes for it. MAF's aren't cheap so I need to know what yours does.

 

[stevemainian]

Did you install a new MAF yet? I want to know if this has any effect even though my car has no codes for it. MAF's aren't cheap so I need to know what yours does.

Didnt do anything. My maf was bad, so thats why I replaced it. Seems to have a bit more pickup now though.

 

[FIRPO]

my 93 3.2 has been having the same problem, i have found what looks like a sensor that plugs into the intake tubing on the firewall side that one of the wires has broke loose and the plug looks like it is falling apart, could this be steve's or my problem?

 

[TankII]

My car is running on all cylinders.

From the first post:
"Started it up one afternoon and it sounded like it was only running on 5 cylinders, "

In any case, if your Cats are running hot, you are losing power and/or the car is missing ONLY when hot, double-check your DIS.

The only code I ever got with a bad DIS was Coil Pack 2 bad, and that was after driving around with the problem for almost a week. When both my CPS units went bad I got no codes.

TankII

*******
'91 SHO+, 199K miles, PPlus Y-Pipe W/ Cats, FPS Reinforced Motormounts, Polyethelene and Police bushings, Konis, Eibachs, BFG KDW's, Carbon-Metallic pads, Composite Rotors, Quaife

 

[stevemainian]

Yea, new valve gaskets and wires and plugs fixed that problem though.

Now it just randomly stalls, 95% of the time its after a hard acceleration., when before it only did it while warm. Now it will stall anytime after you stop from WOT. I think the problem is just getting worse and worse.

 

[Slo-Sho]

Sounds like a leaky injector to me. Have you run a cylinder balance test?

For jokes and laughs...

 

[SonicRiot]

The coolant smell could be a bad radiator cap or a small drip onto the hot exhaust.

A Vaccuum leak would not always cause a constant stalling symptom. This is a larger displacement engine so it can recover from a small leak much easier than say, a N/A 2.0L 4 banger.

It might be running pig-rich. If it stalls after going WOT, perhaps there is a poor fuel/air mix. Put on a scantool and look at the fuel trims, lambda, and fuel/air ratio.

 

[stevemainian]

The coolant smell could be a bad radiator cap or a small drip onto the hot exhaust.

A Vaccuum leak would not always cause a constant stalling symptom. This is a larger displacement engine so it can recover from a small leak much easier than say, a N/A 2.0L 4 banger.

It might be running pig-rich. If it stalls after going WOT, perhaps there is a poor fuel/air mix. Put on a scantool and look at the fuel trims, lambda, and fuel/air ratio.

my o2's are bad, so I know its running rich/lean, im doing these very very soon. So ill see what happens after those are on.