So I checked timing yesterday. #1 piston at TDC on compression stroke, distributor button pointing at 5:00
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1992 Jeep YJ 4.0 will not start
- Thread starter gwood804
- Start date
JKP
Member
That's correct, but if you're not getting any bang on starting fluid and you know you have spark, I'd flip it 180 just to be sure.
Been there done that myself when I replaced the timing set and distributor.
Been there done that myself when I replaced the timing set and distributor.
JKP
Member
With the cap off, align the timing mark on the crank with TDC. The rotor will either be pointing to cyl 1 or cyl 6. If cyl 1, rotate crank until timing marks align again. Rotor will now be point at cyl 6. Pull the distributor and align rotor with cyl 1. 180 deg change in the rotor position.
JKP
Member
Wou
Would it not kick back/backfire if it was 180 out of timing
With the cap off, align the timing mark on the crank with TDC. The rotor will either be pointing to cyl 1 or cyl 6. If cyl 1, rotate crank until timing marks align again. Rotor will now be point at cyl 6. Pull the distributor and align rotor with cyl 1. 180 deg change in the rotor position.
Would it not kick back/backfire if it was 180 out of timing
JKP
Member
I would describe it as a gurgling, or underwater sound. Mine didn't backfire or try to start at all, just cranked and cranked. But the sound was definitely weird.
Gotcha. I will give it a go tomorrow and let you know. Thanks for your help
Rotated distributor 180 and still no start. Actually get some blow back through throttle body
JKP
Member
Sounds like you had it in correctly to start with then. Not sure why it's not at least trying to run on starting fluid.
Just throwing out anything I can think of:
Is the crank pulley in good shape? If the outer ring with the timing mark on it separates from the inner portion, the timing would be off.
Try starting while slightly pressing gas pedal. If the IAC is stuck closed, it's not getting air.
Was it running before? Did you have the timing cover off to check the cam and crank gear timing?
Just throwing out anything I can think of:
Is the crank pulley in good shape? If the outer ring with the timing mark on it separates from the inner portion, the timing would be off.
Try starting while slightly pressing gas pedal. If the IAC is stuck closed, it's not getting air.
Was it running before? Did you have the timing cover off to check the cam and crank gear timing?
Sounds like you had it in correctly to start with then. Not sure why it's not at least trying to run on starting fluid.
Just throwing out anything I can think of:
Is the crank pulley in good shape? If the outer ring with the timing mark on it separates from the inner portion, the timing would be off.
Try starting while slightly pressing gas pedal. If the IAC is stuck closed, it's not getting air.
Was it running before? Did you have the timing cover off to check the cam and crank gear timing?
It was running before. Timing gear/ chain replaced. I'm pretty confident that it was installed in time. Time marks lined up
JKP
Member
with the gurgling /underwater sound , could it be a plugged cat or muffler? are you using enough starting fluid, might try gas to see what happens?