Hey guys, I’m really doing circles at the moment trying to figure out what’s going on with ole black Betty. Once I put it into first and release the clutch the car begins to stall, but if I push the clutch back in the Rpm’s will jump back up to regular idle rpms. Now I’ve noticed there’s a hissing sound coming from the firewall driver side area but I can’t locate it. I’ve also noticed a gradual loss of overall power and performance in the car. I’d really appreciate if y’all could give me a hand, thanks a lot! Ps. Reading some of the forum I’ve heard that the egr might be a problem but it’s deleted.

 

Do you attempt to keep the revs up with the accel pedal as you let out the clutch? And it still stalls when you do that?

What is the normal idle RPM?

Other than that, sounds like a vacuum leak. Did you check all the vacuum hoses - brake booster, EGR solenoid, Opti vent, fuel pressure regulator, HVAC check valve? A vacuum leak would make it stall, and run poorly.

 

So it idles right around 8-850, but if I give it some gas it won’t stall, it’s as soon as I begin to release the clutch it begins to die out

 

Idle RPM is OK per stock PCM program.

Not sure I understand the rest.

Part of getting a manual trans car moving is feathering the accel pedal to keep the revs up as you let the clutch out. To me that's just the way it works, based on 50+ years of driving manual trans vehicles. I don’t even think about it. And that includes driving my 94 Formula T56 with a beefy, heavy McLeod Street Twin clutch. You don't even think about it, just happens. Sure, you shouldn't need to ride the clutch with heavy throttle position, but feathering the throttle doesn’t seem unusual.

Has this problem just developed recently? Or is this something that came with a newly purchased car?

In any case look for the hiss.