iroc will start and idle but give it gas and it falls on it's face

[vinny528]

hello
i'm working on a 1986 iroc with tpi
it will start and idle but when i give it gas it falls on it's face
any ideas why?

[CamaroRS92]

Fuel pump going bad or fuel filter clogged

[vinny528]

Originally Posted by CamaroRS92

Fuel pump going bad or fuel filter clogged

that stuff has already been changed
fuel pressure on rail is about 20lbs
also changed distributor module and coil

[CamaroRS92]

check the supply voltage to the coil to verify it is getting a full 12 volts (if you havn't already)
a short in that circuit or too many other things tapped into the same wire can cause a voltage drop & could cause the spark to not be hot enough to burn the fuel when you stand on it.

[wrightz28]

Originally Posted by vinny528

fuel pressure on rail is about 20lbs

There's the problem, should be 40+ psi.

[vinny528]

ok now this iroc is shorting out the distributor modules
anyone got a clue what would cause this?
it has a new coil and have changed modules twice ,after installin one it would start and idle ,then get warm and stop firing
have already changed fuel pressure regulator also.
HELP

[wrightz28]

So the fuel pressure is 40+ now?

Modules consantly going out could be a bad pick up coil. Also, what kind of replacements are you using? Ac/Delco is the way to go when it comes to the ignition system and fuel pump. They might be pricey up front but worth it in the long run. Also make sure you put ALOT of heat sink grease on the modules base when installing to keep it cool.