Compression Ignition Addict
Join Date: Aug 2017
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Check Engine Light
2007 stock F350 6.0
I really appreciate the help with steering and flush procedure. Thanks guys...
Next up is the check engine light. I've never owned anything this new, so am not equipped with monitoring or scanning tools. I need to get there. When I bought this truck, the PO told me the check engine light was on because 1 glow plug was bad. After I bought it, I took it to a local mechanic for a quick look mainly for a list of repairs so I wouldn't have to pay so much sales tax. He said the check engine light wasn't due to glow plugs, but turbo underboost, exhaust back pressure caused by turbo and sensor related issues.
It starts quickly when hot, and ok when cold if I cycle the glow plugs several times. Without cycling glow plugs, on cold start, it cranks a few times and emits a small amount of white smoke.
As for the turbo, after reading some posts here, I gave it a few hard, max throttle accelerations. On the 1st one, the boost needle went to the red line. After that, it went to about 20. On a flat highway, with no load, not towing, not accelerating, at 60 mph, it runs about 7 #.
I'm not sure how to proceed with trouble shooting this. Are there any tests I can run without a scanner.