my 88 firebird will start after a long time of cranking but as soon as it does it dies both my injectors are squirting and ive got pressure and ive got fire but it will not stay running all of my vacuum lines are good and all of my elec connections are hooked up. I scanned the ecm and no codes whats the deal any suggestions would be welcome

 

When it does start, does it run good? How long does it run?

 

Busted fuel pressure regulator. My guess

 

it runs maybe 4 2-3 seconds tops then takes about 10 cranks before iy will "start" again

 

First guess, flooded or lean. If it's flooded, holding the pedal to the floor while cranking should clear it.

If it's lean (low fuel pressure) spraying some carb cleaner into the intake to supplement what the injectors are providing should make it run.

Less likely but also possible, weak spark.

 

I don't know enough about this circuit to explain, but I recall reading about the oil pressure switch providing a signal to the fuel pump relay. The circuit acts differently during cranking & if the switch doesn't see oil pressure after running it will drop out the fuel pump relay and shut engine down - checking fuel pump pressure during the start sequence may help you diagnose. Sorry for being so vague, but maybe someone can explain this circuit better.
Corky

 

Could be a bad MAP sensor, they won't always throw a code. Be sure to check the vacuum line to the MAP sensor to make sure the sensor has not come apart inside and plugged the hose.

 

now it wont even start but i did notice last night that the injectors are squirting but its just a small stream like a squirt gun from the dollar store,any thoughts. I appreciate all the responses ive got so far

 

Sounds like low fuel pressure. plugged filter and/or bad pump.

Dissconnect the fuel return hose and jump power to the fuel pump prime connector. Fuel should shoot out the return line (be prepared for it). If it does not and you hear the pump running, chances are good your pump is toast.

 

where and how do i jump that to make the return line shoot
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is that on the aldl connector ?

 

Fuel pump prime connector is a short red wire with a black connector hanging off of the Fuel Pump Relay. Conecting 12V battery power (being cautios not to cause sparks near the battery) causes the fuel pump to run.

 

Just disconnect the fuel return line and turn the key to "On". This should only be done with 2 people, anyway. No open sparks with an open fuel line.

 

okay I know this sounds really noobish but i can not locate the fuel pump relay 88firebird formula 305 tbi 700r4 oh and i dont know if it matters but i noticed my fuel gauge is not working its stuck on full