Sudden Change in Glow Plug Cycle
Glow plug cycling has been perfect on start-up for years now. Suddenly it changed. When key is turned on, glow light cycle on dash lasts only a second or less. After several attempts, I can get a long enough cycle barely enough to start the engine and then it will cycle normally for a couple times after starting up.
Would this be related primarily to the glow plug relay? Or, could it be the PCM? I do have a spare, brand new GPR that I plan to put in tomorrow. Other than the GPR or the PCM, are there any other possibilities except maybe the ignition switch or something like that? There are no codes set.
I see on some posts that a faulty or failing temp sensor might be a possible suspect, but my temp guage seems to be operating normally.
Last edited by jerry598; 06-14-2018 at 23:22.
Black 95 6.5TD, 929 block, 173k miles, 65k on IP, 48k miles on self-rebuilt engine done in '09, 6 L&S Full-torque inserts in outer main crank holes, Clearwater heads, Fluidamper, rebuilt NV4500, 3" downpipe, 4" exhaust, no cat, dual T-stats, 9 blade fan, spin-on 180 degree clutch, Heath hi-flow water pump and turbomaster, PMD relocated, OPS relay mod, Heath PROM upgrade, and Kennedy headlight harness upgrade soon. Now use semi-syn Lucas 2-cycle oil every fill-up which greatly reduces the frequency of DTC 35-36 codes the PCM/ECM throws.
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