jrrobinson04

1995 Camaro 3.4 manual. The car stalls when letting out the clutch. Even if I can get it to move it will barely do so. Idle around 800-1000. I’ve been chasing this problem and have read way to many posts about this issue with no results.

Things that hat are brand new on the car.

1. MAP sensor
2. IAC
3. TPS
4. Plugs
5. Wires
6. ICM
7. Battery
8. Coolant Temp
9. Cam position sensor
10. O2 sensors
11. Water Pump

Throwing codes for MAP high.

Anybody have ave any ideas?


1995 Camaro 3.4 - Manual Transmission

Injuneer

“LT1 Based Engine Tech” is for the V8 models. I'll move this to “General 67-02 F-Body Tech”. There’s just not much traffic on the “V6 Tech” forum.

ACE1252

Posting a scan log of the car would help in seeing what it's doing.

Have you been throwing parts at it or has a good tech looked over the car yet? Could be several things that might cause that.

Obvious first step is fixing the high MAP code. If you've replaced the MAP sensor, then you are most likely dealing with some kind of wiring problem(or a new MAP sensor that is bad). Could be a PCM input problem too....but I'd bet wiring first. I suppose it could be a massive vacuum leak as well.....

jrrobinson04

In the area I had a mechanic look at it but when he couldn’t read the codes he gave up. I have since gotten the ALDL cable.

He had told me a few things I could try so I replaced the plugs, wires, and coil packs.

When you say it could be electrical; would a bad alternator be a potential call due to the draw at load?

i will try to upload a scan log tonight after work.

Thanks for your help.

Injuneer

Does it idle smoothly, or rough? Do you get the same results (stall)when you let the clutch out if the trans is in neutral?

When in gear, does it “barely move” because the engine is running rough, or because something seems to be holding the car back... e.g. stuck e-brake?

jrrobinson04

The car doesn’t stall when letting the clutch out in neutral.

The car car has had a rough idle, hard start, and stall at idle.

After several hard hard starts and stalls yesterday I had to jump the car off to start it.

jrrobinson04

I didn’t have the time to run a log on the camaro yet. I did however forget to state that the brakes go all the way to the floor. I read another forum post about the brake booster leaking vacuum. I will try to test that if I get a chance this afternoon.

Injuneer

Vacuum leaks can easily cause the rough idle and stalling problems you are having.

On the other hand, the brake pedal can't go to the floor unless the brake fluid in the system is low or you have air in the lines. A leaking vacuum booster would typically make the pedal harder to depress.

Injuneer

Forgot to ask..... is the MAP code:

DTC 33 = MAP sensor - Signal voltage high / Low vacuum

DTC 34 = MAP sensor - Signal voltage low / High vacuum

jrrobinson04

It was 33.

Injuneer

You need to look for a large vacuum leak

jrrobinson04

I agree it has to be a vacuum leak. i tested the vacuum and it was only 10hg. I have tested each of the lines around the fuel rail, the pcv valve, the break booster /check valve, and the evac line. Should I be thinking intake gaskets?

Also i ran the data log on the car if it helps.

https://drive.google.com/file/d/1xVl...ew?usp=sharing