97 7.3 glowplug problems

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Sep 8, 2007 | 12:28 PM

bkrfrmhell

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97 7.3 glowplug problems

My 97 7.3 glowplugs are not working. Last year i installed new glowplugs and a new napa relay, worked great for 3 months then the napa relay just fell apart, found it just shattered. installed a motorcraft relay, worked great for 6 months now, now it is intermittently energizing. i don't think its the relay, I think its the solenoid activatation power. i think the computer or whatever comands the solenoid is not working. What should I check??? I jump the relay with a bolt and truck fires up fine. wait to start light goes on and off about the same lenth of time as normal. I have a bully dog adjustable chip and I rotated it to stock and makes not diffrence. Help please! I don't want to take this to a dealer

Sep 8, 2007 | 12:51 PM

1997F-350

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From: SHELTON, WA

probably the relay again. i will get you a part # for a good one that is huge. brb in a few.

Sep 8, 2007 | 02:58 PM

1997F-350

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From: SHELTON, WA

Stancor Heavy Duty 586-902

Sep 8, 2007 | 06:23 PM

bkrfrmhell

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Thanks for the relay part number.....I was not at all immpressed with the napa one. Unfortunatley it is not the relay now as there is no power on the small control wires to the relay sometimes...

Sep 8, 2007 | 06:54 PM

c00nhunterjoe

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From: Belair md

motorcraft parts are 12 moth 12,000 mile warrnety, take it back

Sep 8, 2007 | 08:04 PM

bkrfrmhell

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The relay is not the problem, the low amp activation power is. If I power the relay it clicks and engages. is there a glowplug driver module maybe? What tells the plugs when to light and for how long?