Scottyrims

My 84 c4 cross fire runs and drives perfect however i start it drive around park but if i try to restart it, it won't, it just turns over. I let it cool down starts rigjt up mo problem. I replaced cooling sensor and some others but still no fix. This car has a yon of new parts so i dont know what i missed. Any suggestions

corvettenorway

maybe ? When it happens does it have spark / fuel presssure ?

Scottyrims

Yes i saw that one and replaced the coil, along will cap,rotor,plugs,wires. Also cooling sensor, radiator,thermostat. And more. This car is perfect except this stupid problem.

Scottyrims

Yes fuel pressure perfect about 13 psi. Its a new tank and pump and filter

Scottyrims

It has spark also but it seems the injectors dont throw fuel when it happens.

corvettenorway

maybe a bad starter solionid ?

Scottyrims

From what i have been reading you may be right

corvettenorway

have you cange the fuel pump relay ?

Scottyrims

I cant remember i will have to check my notes. This restomod has bin going on for a year now and i dont drive that often. The tank and pump was installed about 10 months ago and i cant remember if i did the relay or not

84 4+3

If it isn't throwing fuel when this happens check to see if it is priming. You said it has fuel pressure is that when it does it as well or no. If not I would suspect the fuel relay. If it is then perhaps a security issue? According to the FSM Chart A-3 cranks but will not run, you can put a test light across the disconnected injector harness to see if it flashes. If you don't have that further digging is involved. If it does flash the book seems to leave a little gap but I'll let you run those tests first. I can scan in the troubleshooting charts if needed.

ex-x-fire

Sounds like a bad ignition module, they act up when hot. Test for spark when its acting up, a bad one will effect inj pulse too.

Scottyrims

84 4+3
i will try that

Scottyrims

i change that its new.

JoBy

Are you sure the fuel pump is running when cranking? When you have oil pressure the pump will start even without fuel pump relay.

Hot Rod Roy

That's not normally a hot start problem, but it's good to cross that one off your list! It's easy to verify you're getting voltage to the f/p fuse, which should happen whether it's coming from the f/p relay or the oil pressure switch. If the relay is bad, you won't get voltage until the oil pressure switch detects about 4 psi. Ideally, you'll get voltage from the relay as soon as you turn the key to the "start" position.



Since you didn't say anything about it not running good when it's hot, I don't think it's an ICM problem. The problem is only a hot start, not a running problem?

If your injectors are leaking, the engine may be flooding when you shut off a hot engine. Park the car hot, then remove the air filter housing. Do your injectors dribble? Do you have a nice, even injector spray pattern when the engine is running?

Hot Rod Roy

Is this true, or a guess?