Register and join the largest automotive community online!
Please Register or Login to access: DriverSide DriverSide Home | Service & Repair | Car Prices | Parts & Accessories | Reviews & Advice | My Garage

91 5.7 tbi starts then dies


Google  
Web AF

starrsdaddy
09-02-2008, 11:21 AM
Will start, run for 10 - 20 sec. then die. I can eventually get it to run after about 5 - 8 attempts. If i drive it i have had it die on me several times in the middle of the road or at a stop light so now it's garaged. I've replace the fuel filter. Fuel pump is a few years old, maybe 30 K on it. Have tested ignition module Ok. Inspected cap, rotor,wires, connections etc... No OBD codes. Now I'm lost?

maxwedge
09-02-2008, 03:53 PM
Ok, it won't run, does it have spark, are the injectors spraying, will it run spraying starting fluid into the TB, all basic diagnsoitics.

starrsdaddy
09-09-2008, 01:25 PM
Ok, thank you for the basics.
I finally had time to try this and yes, when it starts to die out I can keep it running with starter fluid. Once i keep it running for a few seconds it seems to take over and start to run properly. I'm not thinking its a fuel pump because once it runs, it runs fine. I'm thinking it has to do with whatever valves or devices regulate the fuel delivery. When it is finally running, i can watch the spray out of the nozzels and it apears to be a nice consistant spray.
What do I check next?

Thank for your help.

Al

maxwedge
09-11-2008, 04:24 PM
You should check the fuel pressure, 10-13 psi is required.

starrsdaddy
09-17-2008, 01:20 PM
Ok, it seems my fuel pump is bad. It works intermittent. Can i install an in line electric fuel pump to avoid dropping the tank everytime this goes out?

maxwedge
09-17-2008, 05:07 PM
Not really the system is not designed for this, anything can be engineered but a good quality pump should cure this, make sure you do not continually run low on fuel also.

Add your comment to this topic!


Google  
Web AF