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Engine Rebuilt, almost no compression
Topic Started: Oct 26 2013, 06:18 PM (3,397 Views)
vr4


you do have the ecm ground put back on right? highly unlikely both coils failed at once
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Frozen_Joker
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I only found two grounds on the whole car when I dismantled. There was one on the throttle body from the harness. And the other comes off the body and goes to the trans on next to the firewall. Is there one missing I may have missed??
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2000Firefly1.3L
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the headlights have their own grounds, and the batter to the upper rad support
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vr4


The ecm ground comes out of the engine harness near the coils. I'll try to remember to get a pic when I get home

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Edited by vr4, Oct 31 2013, 01:25 AM.
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Frozen_Joker
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I have the ground coming from the harness to the throttle body. I have the ground coming off the battery and to the body near the strut mount, and another battery ground that goes to the side of the trans. I do not recall taking any other grounds off the motor and I have no loose wires anywhere. EDIT: I just ran out and referenced your pic, that is the cap for the end of the cam. I do have a ground on there from the harness. But I never disconnected that. Just removed the entire cap. Lol. So I can see why I looked over that. I need to go down and grab another Multimeter today since my other seems to have gone on the fritz. This way I can do an actual test on the coils between the two towers and see what I am getting.

Update on the compression issue. I got the DNJ gasket in the mail, just put it on and timed it. I check compression before I put it ALL the way back together and I have 120-90-90-120. So I think I need to mess with the timing a bit. I keep lining the marks up, and rotate it by hand clockwise 720 degrees to get those numbers. Should I try to turn it another 360 or something? Or would it start off of that? Cause even though I honed the cylinders, there is always the possibility that the rings are not seating all the way.

So the leaky compression WAS due to the odd shaped head gasket. This DNJ one seats wayyyyyy better.
Edited by Frozen_Joker, Nov 1 2013, 02:45 PM.
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