• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Slow crank when hot ? '71 GTX

same symptoms here, I thought I had to change my stock starter because of heat from the headers. it would crank over really slow when hot after a 5-10 minute shutdown (convenience store) like the battery was dead. pedal to floor, starts every time. 10 years later, still using the same starter.
just for shits and grins , I'm going to try that the next time I'm in that situation.
I guess I should have mentioned I'm running a weiand tunnel ram and 2 600's lol
 
  1. first year i had my car, shut the car off for awhile. Tried to restart, nothing, hard crank, starter turning at 2rpm. Ran the battery down all in vain. Had spark & fuel, must be the damn starter. started visualization of the pain and suffering I was about to endure pulling the starter out of a header sandwich when i got the car home. Called for a Hagerty tow. I was out in the boons so i had some time, about an hour. Tow arrives, i say what the hell let's see if it starts. Fires right up.

i didn't have a tunnel ram though!
 
Heat soak in 30 seconds?! I'm here to learn.
 
never underestimate an edelbrock carb...

to your point though, sitting on top of a tunnel ram out the hood maybe not.
 
I have an update, the slow crank when hot problem appears to be gone after installing a New group 27 Battery a few days ago. The old Battery (group 24) tested good but was from 2012. Finally putting some miles on after Chronic ignition issues.:thumbsup:
 
Hi guys, I'm also having a similar issue with my freshly restored 1970 Charger R/T. She fires right up when cold. If you drive it in stop/go traffic for 15 minutes and shut it off, she barely cranks. If you let it sit for 10 minutes she'll fire right up. I noticed the negative battery cable that's grounded to the intake bolt and radiator support gets pretty limp when trying to start it when hot. Battery is a brand new reproduction that measures 12.7V when it's unhooked. 1970 B bodies only had these 2 ground points and none of my other 70's have this problem. I'm open to ideas and thanks in advance. Bill

Yellow RT Front Side.JPG Yellow RT Engine.JPG
 
My 1966 Imperials and '71 GTX have a Ground strap on the back of the Engine on the Pass.side.The strap goes from Eng.block to the firewall.I had a hot start problem and a New group 27 Battery solved the slow crank issue.
 
Wasn't the OP's problem but will second the check your cables. Original starter cable in my fury looked fine from outside, but had the same barely start when hot even with a mini. Turned out that cable was almost powered corrosion inside, the copper had disintegrated.
 
Yes my group 27 battery is 800cca and I've had it for about 8 years using the battery tender.
 
One way around hard starts is to kill the ignition untill the engine is turning. Then fire it up.
 
Auto Transport Service
Back
Top