bigbear4

I just replaced short block. If cam timing is off one link, can it cause this problem? Thanx

yotafreakshow

yup, how low is the psi?

bigbear4

Have to find my comp guage........I'd guess about 50 or so.

bigbear4

Not enough for ignition though.

Nam

50 is way to low...got to be over 100 for combustion.

Nam

bigbear4

I moved the chain one tooth...Made no difference......Head was cleaned, surfaced ...valves checked out good......Honed short block, new rings....all the rest are firing so well that when disconnected individually, engine dies. When I pull #1, no change.

bigbear4

OK....I seem to have adequate compression but cylinder doesn't fire.....pulled injector and applied 12 volts to it and it works.........Should I read 12 volts across injector plug contacts when running ?

yotafreakshow

is the injector plugged? you said it works, does that mean you can hear it click when current is applied, or have you tested it with fluid under pressure. I'm visualizing an old turkey baster with a length of rubber tubing fit over the end of the injector that plugs into the fuel rail to apply the pressure. Then apply current and see if it sprays. I can see this creating a pretty major fire hazard though. I'm sure toyota sells some expensive test tools to do it more safely. Have buddy w/fire extingusher nearby! :fireman:

AgRunner06

You can see if the injector is firing by putting a screw driver on it and feeling it click. What does the spark plug look like after you've had it running? Is it wet? If not then the injector isn't spraying fuel. If it is, then you have a spark issue with that cylinder.

bigbear4

Is the injector supplied with 12 volts to fire or is the voltage constant and it is supplied with the ground? Thanx, Gary

bigbear4

Thanks For All Your Suggestions. I Found A Section Of Wire In Loom That Didn't Get From Point A To Point B !!!

bigbear4

Auto trans that shifts from first to fourth bypassing 2 and 3. Any ideas? 85 fourrunner