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Old 03-17-2004, 10:26 AM   #6
Hozer 88GTConv
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Join Date: Feb 2002
Location: Jacksonville, FL
Posts: 706
Default compression check....

Compression is good, about 118 psi in number 5.
Number 6 was 118 also.
7 and 8 were 120.
Taken about 2 weeks ago, just prior to the upper teardown.

I have rebuilt the cylinder heads, new head gaskets, intake gaskets, etc....
I know I had a oil problem in 5, but I fixed it with some new teflon valve seals.

I am really zeroing in on my fuel pressure, 02 sensors, and the thermostat.

My motor never gets above 180. I get 18 MPG and I have a feeling it's due to the computer sensing that the car never gets to operating temp, so it keeps the mixture constantly rich by staying in open loop.
That, has in turn, fouled my 02 sensors to boot.

I am going to change to a 192 degree t-stat today and get some off the shelf fuel injector cleaner.

I also have verified my fuel pressure at 39 PSI.
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1988 GT Convertible
331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta...
One week with new motor, two speeding tickets...joy
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