starter drags
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Joined: Dec 2004
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starter drags
My 86 full size bronco with a 302 EFI has starting problems. It seems to be related to the engine getting hot after being shut off for about 5 minutes. For example: if I stop and fuel up and immediately get in and try to start it, it will barely crank. Also I notice that the temp hand is up to the "L" in normal. It usually runs in the middle going down the road or even idleing ( on the "M"). If I wait about 10 to 15 minutes (and the temp hand is down to at least the "A" or "M" then it starts fine. It always starts great cold. Actually, it always starts great at any temp if it will crank. Please help me out. It worries me that the engine is hot enough that it wont crank.
Lead Driver
Joined: Dec 2002
Posts: 5,489
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From: Kuna ID
How old is the starter? Do you have headers, or is the exhaust unusually close to the starter. Some headers will really hug the starter in order to make a clean fit, and the starter absorbs the heat, and will crank slower. It is normal for your temp to go up when you shut the engine off, it usually goes up 20-30*. What condition is the battery in, a weak battery will cause slow cranking as well.
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Sycostang, thanks for the reply. My battery is in good condition, actually new. I do not have headers but I do need to check the exhaust pipes in relation to the starter. I had not considered that possibility. That makes more sense than the engine being so tight that it wont crank. I'll check it out and post.
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Holmes, That also sounds like a good idea. I am a mile from a starter shop who can replace or rebuild it for me. I believe I will try a heat shield first just to see if that corrects the problem. Even if it does I will repair the starter because the many times it has strained to crank has probably taken its toll.
Posting Guru
Joined: Nov 2004
Posts: 1,137
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From: Asheville, NC
Also have an Oldsmobile Toronado with the old 307 Rocket V8. Was told the starter would cost over $100... Pulled it off, looked at the brushes, replaced them, didn't replace the bendix. Cost me $2 and change for the brushes. Ended up pulling it again a few months later for the bendix replacement. Hee hee hee...
I keep telling myself how much fun it is working on my own cars...
I keep telling myself how much fun it is working on my own cars...
Logistics Pro
Joined: Jan 2002
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From: GANS
Sounds like you need to replace your ground wire. When it gets hot, it won't supply enough current to the starter, also causing hot start problems.
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Bremen242, Ill give that a try also. I am going to do these fixes one at a time and i will post the results. Thanks
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Posting Guru
Joined: Feb 2005
Posts: 2,499
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From: Missoula, MT.
i hope you figure it out...i have an 86 with a 300 in it that does the exact same damn thing
could it be the cellenoid? I have a brand spanking new started and battery...still wont stary when warm...
but ill try new ground wire next
could it be the cellenoid? I have a brand spanking new started and battery...still wont stary when warm...
but ill try new ground wire next
Elder User
Joined: Oct 2004
Posts: 541
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From: Fleming Ga
Sounds like the stator inside the started may be dragging on the field coils when hot. Sometimes on a starter The bushings will wear allowing the stator to wobble just a little bit and let the stator touch the field coils, or the plates in the stator will slip a little bit allowing one to stick out just enough to touch the field coils. Only happens when they get hot and expand causing the starter to drag. Let them cool and everything works fine again. It is possible to take the starter apart and grind off any place where the stator appears to touch the field coils but better just to replace.
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still dragging
OK, here's what i've done so far (and it has not fixed the problem). I have replaced the battery, starter, and wrapped the exhaust pipes near the starter with fiberglass cloth to insulate. It does the same thing. I can spray water on the starter and it will crank OK! Im going to get a ground cable today and try.
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