This is in regards to the '89 IROC in my sig, of which the engine was recently rebuilt (~1,000 miles since the rebuild). L98 engine.

This was actually the second time that it has died since the rebuild. The first time, I was taking off from a light, driving very conservatively, when the engine speed dropped from like 2,000 RPM to a very low speed for a couple of seconds. The car just rolled like it was in neutral even though my foot was on the gas, and then it picked back up again like nothing ever happened. This happened when my foot was on the gas. I gave my car the benefit of the doubt, however, since the gas gague was very low--decided it was probably just running out of gas.

Today, I was at a stoplight and it was just idling when it died. I then put it in neutral, cranked over the starter, and it started right back up.

In both of these situations, I did not see a "Service Engine Soon" light come on after the engine started up again. So, I take that to mean that it didn't store any codes, and thus the computer doesn't know why it died. Also, the car was behaving completely normally before it died and after it started back up. The engine idles *very* smoothly (as well it should after a rebuild), so it seems odd to me that it would just give out for nothing.

Any ideas as to why this might be happening, and what I can check?

Thanks

 

I don't see your sig here.

Anyway when you rebuilt your engine, did you add a cam, injectors, add displacment, etc?

How is the ingition system? I assume you put on new plugs, wires, cap, rotor, coil when you rebuilt the engine.

Let us know...

 

Sorry--I don't know why it didn't post my signature the first time, but I fixed it...

As far as the rebuild goes... I replaced and machined all of the parts anybody else would have during a "standard" rebuild. The only thing I did that might have been a little bit different was that I had everything rebuilt to stock spec. So, that means that I got a new cam, but the cam's specs *should* be the same as what the car came with stock for its year. I didn't replace the injectors, but they only have ~117K miles on them. The only displacement that I added was the minimum amount needed to bore the cylinders--so it's a 355 now instead of a 350.

The distributor cap, rotor, wires, and plugs are all new, and the distributor has been rebuilt. The wires are Bosch Platinum, I belive, and the plugs are AC Delcos.

 

Nobody knows?

Well, I just had another "almost died" episode today. It happened when I was taking a turn at an innersection--had my foot on the gas accelerating around the corner, and the engine just bogged way down for a second or two, and then picked right back up again like nothing happened.

What are some of the things that I can check to pin this problem down? I know that engine stalling is not an uncommon problem, although the causes can be extremely diverse...

 

The bogging/stalling while cornering sounds like what happens to a lot of us when we are low on gas. I don't know if you have the "baffled" tank that prevents that though. There is no way I can accurately figure what is wrong, but when was the last time you changed your fuel filter?

 

intermittent bogging/stuttering sounds like a fuel delivery problem to me too