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CATEGORY LISTINGS > FORD DIESEL > a Confused know it all...Slow cranking 7.3 [ REFRESH ]
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a Confused know it all...Slow cranking 7.3


Created On Wednesday December 17, 2003 20:47 Diesel Talk
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DieselPwrTech
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Note Wednesday December 17, 2003 20:47 View thread in raw text format
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well I am a bit perplexed....a friend has a 88 F250 with a 7.3L International. a few days ago she was fine....then I got a call from him and she wouldnt Crank...had been acting like batteries were dying all day. batteries were tested at 12.5 each, good on the load test and specific Gravity....assuming they were good I turned to the Starter.....a new starter did not solve the slow cranking issue.
roll starting ( after a normal preheat ) gets her running and she runs great plenty of get up and go! no missing no stumbling, in fact there is nothing to nindicate a problem untill you shut her down....then the slow cranking begins again.
I have heard of only two occasions where batteries tested good but lacked the cranking amps to do the job, before my friend spends over $200 on new batteries........anyone offer a bit of help here? starting & charging systems are my weak point and The problem is right there but dumping $200 in parts on a hunch is not somthing we can do without a strong sense that it will cure the problem....

ANYONE Your thoughts PLEASE...
TIA, Dannydisgusted
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DieselPwrTech
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Note Thursday December 18, 2003 21:51 View thread in raw text format
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batteries re NOT the problem...Grrrrr
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DieselPwrTech
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Note Saturday December 20, 2003 00:04 View thread in raw text format
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well folks any insite would be cool but I think we have found a possible shorted harness but if you know some thing please......
thanx in advance
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ultimatetexn
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Note Sunday December 21, 2003 22:40 View thread in raw text format
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Hey Man i have a a 93 with a 7.3 in it also.mine was having a hard time starting and i went throught he battery thing then a new starter and even a cylinoid but in the end after spending all that money the voltage reulator was going out and it was the cheapest part to buy go figure. you might want to try that b4 you try anything else if that doesnt work trace the ground wire if that starter was going out it will burn a ground wire in half when it finally goes.

Wish you luck bro,
ultimatetexn

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Paul Causey
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chevytrk13
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Note Sunday December 21, 2003 23:50 View users profile View thread in raw text format
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One more thing to remember, I have seen faulty cables and bad connections create enough heat to melt lead, as far as wire and terminals are concerned. Most folks remember to start with the basics, but in case nothing else works....................p.s. the short thing is a good lead, maybe a faulty plug controller or shorted plug. -Frank

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55 Years of combined diesel truck maintenance experience.....
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DieselPwrTech
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Joined: Dec 2003

Note Sunday January 04, 2004 22:08 View thread in raw text format
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thanx Paul and Frank,,,
we ended up triing a semi direct wiring to the GPs using a salvaged Chevy harness and solenoid to a push switch....cranks fast and runs strong again...now that hes got a temop fix we can sit down and make it right again
Thanx again
D
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