Hi everyone last year has been a rough one. I just got done restoring a 1985 Fox body. I spent 2 years on that car and then May 13th 2024 I just got done redoing the interior on that car. And then I started to charge a lithium battery for my bike. 2 hours later the battery exploded and exploded and exploded. That's right inside of a 48 volt lithium battery are many more batteries called 18650s 3.6 volts each. And when the big battery explodes then the rest of the batteries explode one after another spewing fire and explosions everywhere. .My Fox body was completed for 2 hours and it was burned to the ground and so was my house plus all my tools. I couldn't see doing everything all over again on another Fox Body so I was looking at prices on cars and I found my current project. A 1984 Corvette coupe. I think it's cool how these cars have a targa top. Mine had a lot of new parts when I first got it. And I was guilty of throwing some money at it also. But I finally rented a fuel pressure gauge and saw how fuel pressure started out at 18 pounds and as I drove the car the pressure dropped down to 8 pounds and would not accelerate. But here is the deal if I shut off ignition and then restarted the car it would run ok for about a block then upon acceleration it would flatten out again. . So even though fuel pump was new I decided to replace it. While I was in there I tried clearing the hoses and that's when I found the problem. The return hose was blocked back where it goes into the tank. The metal hose was full of rust so I spent the afternoon flushing the hose that goes into the tank. The return hose had these big chunks of rust . I put the new fuel pump on just in case the other one was ruined by running dry so many times. The car runs like new now.

 

Great work you did there, welcome to the forum though!

 

Moved no to C4 Tech for continued discussion.

 

Well, hopefully you put a fuel pump for an 85 in it. The stock crossfire's love 13psi. But most 84 fuel pumps I've tried from many different brands only put out max of 10-11psi.

One thing you can do to get the most out of an 84 pump is to dial the fuel pressure regulator up to try and get more psi. That's in the rear throttle body. Pop off the air filter lid, then remove the 5 Torx screws on top of the injector pod. 3 are long, 2 are short, obvious which goes where on reassembly. Pop out the anti tamper stamped steel cap to access the D shaped adjustment screw. Counterclockwise will increase fuel pressure. If you're running an 84 pump you can max it out. If you're running an 85 you'll need a fuel pressure gauge T'ed in from the front hard line going from the passenger to driver's side throttle body.

Welcome to the obsession

 

Welcome!!!

 

Thanks I will give that a try. Yes I did put a fuel pump in from a 85. Before I figured out what my problem was I ordered a rebuild kit for both throttle bodies and new gasket kit for the manifold. Do you know where I can get information for porting my Intake and also any secret ideas to beef up the throttle bodies while I have them apart. Thanks

 

Check out this thread

mike111's porting