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Re: 89 C 3500 7.4l TBI with issues
Quote:
Originally Posted by ChevyTech
Welcome to the board!
Are you getting the 229 degree reading from the temp gauge or from the ECM data?
Did you set the timing to Zero or 4 degrees BTDC?
Does your truck have a canister purge valve? I have run across several 1 ton trucks leaking vacuum at the canister purge valve.
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The canister is disconnected and vac line is plugged. I set the timing a 4btdc. I finally got it cranked yesterday. The temp is coming from the guage 8n the left head. I mounted a new manual guage. I noticed when I took the motor down that the heads and pistols had a white haze on them like it. Was running lean. I repaired the egr lines. The injector flow looked good I haven't checked fuel pressure. I noticed every parts store calls for a 6 blade fan and this truck has a 5 blade fan on it. When that guage goes up I engage the electric fan manually and it doesn't make a difference
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