Ok guys heres the deal ive been threw 2 tpi cars and im starting to really hate them i bought an 88 vert that i thought needed minimal work. Car had a 305 tpi swaped in along with a world class t5. When i bought the car it ran alittle choppy but that was it i have fixed the choppy idle problem and now have a massive miss. Now when i say massive miss i mean to the point where the car has no power and barley moves when i let the clutch out heres what ive done so far..

Distributor
cap and rotor
plug wires
plugs
compression check ( all cylinders are fine )
computer check
the car has most of the vacuum stuff hooked up but whatevers not hooked up is plugged i keep doing stuff and nothing seems to change it so before i rip my hair out please experts of thirdgens PLEASE HELP! i really just wanna drive the car any help is appreciated

 

So no codes showing?

 

No codes showing o and I tried a new computer and a different prom no chance so rights now it has a super chips prom in it

 

How does your fuel pressure look?

 

Fuel pressures good it's between 37 and 40 psi

 

If it's truly a miss you need to find out which cylinder. Disconnect one plug at a time and run it. if it's worse, it's not that one. When it runs the same you know which one's not firing and you can work back from there.

 

Also, ohm the injs and check the inj harness to see if its firing all the injs

 

I did the wires makes no difference on any of them the injectors are next it smells like its really rich how do I go about ohming the injectors I have the tester I've just never done it can you explain the process

 

Ok so I ohmed all the injector plugs there all at 12.15 so what's next could an injector be stuck open

 

if its rich it should throw a code...

 

Ok I ohmed the injectors all were 12.15 without motor running plugged them all back in and fired the car up and it ran AMAZING for about 5 minutes the started to run like garbage what's wrong

 

I would replace your injectors, 12 ohms kinda low already

 

I think stock injectors should be around 16. Fuel pressure should be around 42 to 45psi with the vacuum off.

 

check timing and make sure knock sensor is plugged in properly,check to see if your dist rotor is pointing to no.1 cyl when your at TDC first.

 

did u take out the distributor for any reason?

 

injectors change them ,fuel pump has a little filter inside the tank refer to a sock it gets clogged and mushy when ever the demand for gas occurs it restricts it

 

What exactly did you change between there being a "choppy" idle (before) and a dead miss under load (after)? It's good you did some basic tune-up items but whatever you changed probably also CAUSED the new dead-miss obove idle.

Put your thinking cap on.

 

Wondering on the distributor - if you put in a new one were you sure you did not miss putting it in by one tooth? Also is it a Delco Module on the distributor? Make sure the wires are not burned and they are secure on the module attached to the distributor. Mine ran like this and I replaced MAF, TPS, Distibutor, Cap, Rotor, Delco module, New injectors and all new plugs. Finally ran great but still had to reset timing to correct specs. Ran great for almost 800 miles then back to sluggish. Turns out MAF was bad.
Try unplugging MAF and see if this helps... If so, MAF is bad and it reverts to limp home mode.