Need some help from the professionals.
#11
03-27-2018, 03:24 PM
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Ok so there's a chance your off a tooth on the timing set. If your cam is off it can allow fuel to go back up into the intake and ignite. Even being off by one tooth can do it. There's also a chance that one of your injectors is sticking open a bit when the truck is running, usually caused by small particles of debris that get I to the injector. What happens is after the cylinder goes through combustion the cylinder is hot and if the injector hangs open too long the heat in the combustion chamber can self ignite the fuel. There's some videos online of people removing injectors and cleaning them out. I've never tried it so idk if it'll work
Iam positive the timing is not off as I double checked it before putting it back together uness what little slop in the new chain is causing it to be off? the only thing left to replace is the crank sensor and another O2 sensor.
vizi
#12
03-27-2018, 03:26 PM
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Aww I can't give up on her yet... I have come this far and I am more determined to get it running right.
vizi
#13
03-27-2018, 04:21 PM
#14
03-27-2018, 07:51 PM
7 seems low, compared to the rest... 135 is great for these engines, especially with that many miles...... but with your highest at 181, I wonder if those high cylinders are built up with heavy carbon deposits? they say your lowest compression should be within 80% of the highest. Youre right on the edge of that....
I don't remember seeing these engines "normally," with 180-ish compression even when closer to new. 150-ish seems more like it as I remember....
6 and 8 being wet.... probably flooding out.
I don't remember seeing these engines "normally," with 180-ish compression even when closer to new. 150-ish seems more like it as I remember....
6 and 8 being wet.... probably flooding out.
#15
03-27-2018, 08:44 PM
You're probably not going to find this suggestion to your liking, but you really should double check that you (or someone) didn't inadvertantly swap the plug wires on cylinders 6 and 8. Its an easy one to miss, and the engine will run despite the cross-over. If those plugs are wet, yet you have spark going to the plugs, follow those wires back to the distributor and be sure.
#16
03-28-2018, 01:21 AM
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7 seems low, compared to the rest... 135 is great for these engines, especially with that many miles...... but with your highest at 181, I wonder if those high cylinders are built up with heavy carbon deposits? they say your lowest compression should be within 80% of the highest. Youre right on the edge of that....
I don't remember seeing these engines "normally," with 180-ish compression even when closer to new. 150-ish seems more like it as I remember....
6 and 8 being wet.... probably flooding out.
I don't remember seeing these engines "normally," with 180-ish compression even when closer to new. 150-ish seems more like it as I remember....
6 and 8 being wet.... probably flooding out.
They were not flooded out as the plugs were wet when I took them all out and unplugged the injectors before I started the compression test.. As for the not being the original owner I have no clue if the motor was ever rebuilt or replaced..When I had the heads off I didnt see much carbon deposits on them.
vizi
#17
03-28-2018, 01:23 AM
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You're probably not going to find this suggestion to your liking, but you really should double check that you (or someone) didn't inadvertantly swap the plug wires on cylinders 6 and 8. Its an easy one to miss, and the engine will run despite the cross-over. If those plugs are wet, yet you have spark going to the plugs, follow those wires back to the distributor and be sure.
I thought about that to and double checked all the wires just to make sure as i had the same thought that maybe I swapped them mistakenly... lol
vizi
#20
03-28-2018, 06:56 PM
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vizi