It does sound like it could be ignition related, another possibility is if it has the factory timing gears with nylon teeth that wear down to nothing and will cause a lot of timing issues.
REGAL 86 regal v6 acceleration issues
- Thread starter Albert714
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What size rear cylinders are you running on your Regal, coil over or coil under and are you running a slip yoke on your drive shaft? Locking up the rear end pushes your drive shaft forward shoving it into the transmission. Dropping the car pulls it away a bit. Running 10" cylinders with a tall coil stack or 12" cylinders with a precut stack will shove the driveline into the transmission when fully locked up. This eats transmissions like a son of a gun. Thats why you truly want to get a slip yoke and get it installed. Have the driveshaft tech measure fully locked up and fully dumped and they will determine exactly what to cut out and put in the slip. Hoppos sells them and so does Black Magic.
Another thing i have personally had happen, the catalytic convertor crapped out on my monte. wouldn't accelerate spit and sputter. would idle fine but under load would clog up and choke the engine out.
I could actually hear the pieces rattle around in there with mine. Just make sure your on the right track before removing hard parts. Id check all the simple small things it could be first...
I believe I’m running 12-14 in rears with coil over and springs are cut as well I never really raise the back unless I’m hitting a corner besides that I always have the rear laid down
I have gutted cats on the car by cutting a flap and then using an air chisel to break up the insides and then bend the flap back and weld it shut.
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