Wierd problem with my 97 4.6 HELP!!
#1
Wierd problem with my 97 4.6 HELP!!
I have a 1997 f-150 4.6L, the truck starts fine, idles for maybe 3 seconds, goes up about 200 RPM's right before it dies than literally just shuts off. I checked fuel pressure today, it was 40 all the way, never dropped. I am stumped on this problem, please help someone. The truck ran fine, I sat it for 3 weeks and this is what happens now when I start it up.
#2
I believe 40 PSI is too low. I have a 96 and it says 50-60 with the engine running I think. I know the 97's are different, so your specs could be lower. Is it throwing any codes? Check for them even if the CEL isn't on. If it isn't on, I would say fuel problem. The pressure could be good, but the flow could be bad. It's somewhere to start anyway.
#4
- Connect the scan tool and turn the ignition key ON but do not start the engine.
- Following the scan tool manufacturer's instructions, enter the output test mode and run the fuel pump to obtain the maximum fuel pressure.
- The fuel pressure should be between 30-45 psi (210-310 kPa).