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totle totle is offline
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Join Date: Oct 2008
Location: Norway / Miami
Posts: 1,313
Garage
Engine started to "puff"

I have just barely driven my car after engine rebuild.
Yesterday I went for a small drive to measure AFR. The engine stated to jump, got fire from the exhaust and died.
I found that the wire between distributor and coil, was loose since I there was a spark to ground spark wires on distributor
I hooked up the wire and the car started but was running poorly.

Today I have tried to figure out what is wrong.
Ignition is correct, but when misfires, it jumps between Z1 (TDC) and 10 degrees.

I measured the pick-up in distributor since I was not sure if this was destroyed to to spark from coil on spark plug wires.
It was measured to 650 ohm, so I guess this is all working.

I removed all the plugs and 5 of them was dry (little to black, but running too rich)
The spark plug on cylinder 1 was wet
I checked and verified that there was spark on this spark plug.


Tomorrow I will do a compression test on cyl #1


Please help with suggestions, running out of ideas now

Next I'm thinking loose rocker arm, exhaust side??

Not a good video, but might give you a clue. The "puff" you hear is air coming back and out intake manifild


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Trond R.
1979 930: Garret GT35r turbo, EFI, carerra intake, Link EMS, custom GT2 cams, 98mm JE P/C, 964 crank (stroker), custom valves & ported (XtremeCylinderHeads) etc..etc..
1972 914-6 GT replica project
1986 944 Turbo

Last edited by totle; 05-08-2010 at 11:59 AM..
Old 05-08-2010, 11:10 AM
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