85 runner

looking for help i have a 85 4runner with problems which is, i start the engine comes on for about 2 seconds and dies i chek the injectors plug,test the power to the wires and they both test 12 volts to my knowl one should be ground pulse any help please.

fustercluck

if you have spark, timing and compression (which you do if it runs at all) then it is a fuel supply problem. How old is your fuel pump? How old is your fuel filter? What is your fuel pressure? You could also have a wire grounding you out if the engine dies randomly.

85 runner

thanks man this is what i did this morning i disconnected a hose from the intake spray carburator cleaner while starting the engine and it stayed on for as long i was spraying. so there must be something cutting the pulse to the injectors

4Crawler

iTrader: (3)

Might be it is running off the fuel from cranking the starter but the AFM is not kicking the fuel pump on. Try the fuel pump test jumper to check that out:
- http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump

You need a special tool (noid light) to test the injector pulses, they are too short for most volt meters to read.

fustercluck

Yep, compression, spark/timing or fuel; it'll always be one of those. Just start by eliminating one by one until you find the gremlin.