I just bought a 1992 Camaro RS 3.1L V6 with 175,000 miles. When i floor the pedal, it will rev up to about 4 - 4500 rpms and just acts like it hit a wall. The only thing thats done mechanically is MSD wires, Crane Cams cam (not for sure which), and it still has the cat. on it. with the stock muffler system. Any idea's? Thanks For any help.

 

Fuel pressure might be dropping at WOT. I don't know much about the 3.1's, when mine took a dump I got sick of it and dropped a v8 in.

 

dose it stlll out in park or nutural-- if so it is probly a built in rev limiter to keep it from blowing up if in gera refer to post before this one

later and

GB

rick

 

Nope, a few months back (6 months actually) it never did it when i was looking into buying it. Back then it'd goto about 5500 rpms and shift. Now it revs up to 4500 or so and just kinda hangs there.

 

He didnt mention anything like that in the mods though..?

Does it bounce, like a rev limiter will make it do?

 

Not like a rev limiter. Just like the whole car freezes. Tach and everything just hits a wall. No bouncing. Sometimes if it revs. It revs really slow.

 

Any codes? If you have an a/f guage, or tap into the o2 sensor with a multimeter, maybe you can see if it's leaning out from no fuel pressure or something...

 

Well, i can actually get my cousin to let me use his laptop and i can do a realtime log on it....Would that show enough information?

 

umm I'm not really sure. You're going to have to get help from someone else on that one. I would imagine it would, but only if it's collecting the right information...

 

Could be a clogged cat also.

 

I'm surprised it'll spin to 4500 with that kind of mileage on the valvesprings.

 

well, if it's cold out I bet your guage is off. get the lap top and see for your self then you will know if it is a guage problem first then you can go from there

 

Well, thats the thing i had kind of wondered about. It has a crane cams cam in it and he said he used the stock valve springs. When i talked to him he said it had started doing all this about a month after he installed the cam. Which made me wonder if the cam is putting a little extra stress on the springs? Going to hook it up to the laptop tonight.

 

That'd be my guess, my cat broke internally and wedged a piece sideways, took the GTA to it's knees, wouldn't rev past 2000 in neutral. It was kinda like hittin' a jake brake at 50mph

 

I vote for a plug in the exhaust system somewhere.