Originally Posted by mwhitney86
Ive done an engine swap and when it starts it idles high and runs for 8-12 secs then dies as if it is running out of gas. Ive started from the tanks and blown out all gas lines, replaced fuel filter under skid plate, tried a different high pressure fuel pump, have checked all vaccum lines. I cant hear the fuel pump on the frame kick on and cant find the schrader valve on the fuel rail to check pressure. Need help have too many hours into this project. Have a haney book but not sure how to test with omh meter.
From other discussions here I seem to remember that the scrader valve may not be present on some engines.
The computer shuts the pumps off after 2 seconds if the engine dose not start. For testing you can force the pumps on by shorting pin 6 of the test connector to ground.
For details follow the link in my signature below.