Anyone have any ideas as to what would cause my 4.9 to have a hard time starting hot?
I am thinking its either wiring overheats and resistance increasing or starter overheating causing simillar problem or both. It has a hard time turning over when its up to temp after being turned off. It will not turn over I can try a few times and eventually it starts to crank, then it will crank without starting, eventually it catches and starts. When cold it fires up the first time every time. As it warms up I can watch the volts on the voltmeter drop from as high as 17 to about 13.5. Also for anyone thats been keeping track the other issues still have not been fixed, no IAC and I cant scan the ECM.
Really the same problem? The starter is of unknown age and was a junkyard find Im pretty sure. Though it was tested by the machine at autozone. Was there anything else that tipped you off to it being the starter?
In my case the car keep getting harder and harder to start over a period of months (it was the starter that was with the engine when we did the 4.9 swap). Checked the cables, these were new due to the battery relocation to the front. The battery had a few years on it so that was replaced and that did not help. Added another ground wire directly to one of the starter bolts, no help. So it was down to the starter. I thought if I bought one and it did not solve the problem I could put it back in the box and try and get my money back. I had no problems after that. I used that starter for about a year and then the 6 speed trans was put in and I went to a PowerMaster starter, but I did save the old starter. A short time later a local member of PFF told me of some hard starting problems when his engine got hot. Gave him the starter I had and it solved his problem and he is still using that starter.
Jack
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09:02 AM
Fieroseverywhere Member
Posts: 4242 From: Gresham, Oregon USA Registered: Mar 2006
good to know. And yeah if thats not it I can just return the starter, had to do this while figuring out the whole shim thing. Bat is new and relocated so all the cables are new and I have 3 large grounds to the block.
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03:43 PM
olejoedad Member
Posts: 18114 From: Clarendon Twp., MI Registered: May 2004
Anyone have any ideas as to what would cause my 4.9 to have a hard time starting hot?
I am thinking its either wiring overheats and resistance increasing or starter overheating causing simillar problem or both. It has a hard time turning over when its up to temp after being turned off. It will not turn over I can try a few times and eventually it starts to crank, then it will crank without starting, eventually it catches and starts. When cold it fires up the first time every time. As it warms up I can watch the volts on the voltmeter drop from as high as 17 to about 13.5. Also for anyone thats been keeping track the other issues still have not been fixed, no IAC and I cant scan the ECM.
the caddy starters are notorious for being affected by heat soak after a few years of use.. try finding a junkyard starter shield, and replace the starter. i personally think the allante starter is a higher performance starter, it spins much nicer than the 4.9....
