[93 devillelemon]

I have a 93 Deville. The problem is:
In the summer time when it is hot,and I run the AC, then when I kill the engine,it doesn't want to start again. It just acts like a starter when it gets hot and drags , just makes a sound like a low batteery.
Here is what I've done to it,
Put new Starter,Battery,New Battery cables on both complete and added a starter shield.
Still a problem,,but only when I run the AC. I can leave it off and no problem. Also, when the weather gets cold,no problem. Have had this problem for 2 years now!!!Help

Another problem is over heating now. Flushed out the radiater,,replaced Thermostat,the cooling fans in front of the engine is working. Only over heats when the AC is running and sitting still in traffic for over 3 minutes.

Any ideas on these problems.

 

[Stoneage_Caddy]

your overheating isnt helping your starting problem much

ive found on a few 4.9s that they act liek high comperssion big block chevys when there hot (when it comes to the starter) , we always called this a case of "the hotties" , ive been playing around with a idea and if you desperate or bored enough then it might work for you , go out and see if you can get a "starter heat shield" from a 1986-1988 chrysler lebaron GTS with the 2.2 turbo , these are made of 2 sheets of reflective aluminum thats less than 1/16 inch thick with a 1/2in layer of insulation inbetween and see what that does , but i think the starter does stay cool enough and it could be just that cadillac engines are excatly liek the big blocks , the only to sove the problem on a big block was to go to a smaller higher torque reduction gear starter

was the starter you got remanufactured ?, sometimes it could be that the windings on the starter are smaller guage than what GM perscribed , they do this to save money, problem being is the smalelr windings dont deal with heat as well as the OEM windings

i went to a higher cold cranking amps battery and it seems to have cured my issues

 

[Katshot]

All good suggestions. I'd also check the ground cables to the engine block.