Compression Ignition Addict
Join Date: Sep 2006
Location: So Cal
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Low compression... Rebuild or New Motor?
Recently the 'ol dog was running rough, took her to FORD.
Results: #8 cylinder missing on low compression. Ran codes, has code for #8 contribution. Did an injector electrical test and passed. Did a relative compression test and found #8 cylinder low on compresssion. Did a blow by test and it had 16" of vacuum on the blow by the max is 8" of vaccuum.
Now my question is: Is this mostly likely rings? Oil is also cominig out the exhaust, pretty sure its because of the blow by. Could it be from bad valves? Any help is appreciated. Any info needed?
O7 F-5504dr 4wd cab and chasis w/ 12' Scelzi service body 6spd manual trans. 200" WB 17,950 GWWR 4.88 gears
Overhead gauges w/ EGT and Boost. FCDP EGR Delete. AEM Workhorse CAI. Down pipe only, no cat or muff.
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