i Have an 89 rs 2.8l. runs great for 45 minutes after that no power engine back fires and will not accelerate. i replaced the cap,rotor,wires,plugs,tps,iac,vaccumm hoses, airfilter, air pump check valve. air pump pipe, removed the cat, noe the only weird thing is the timing is set at about 25degrees or else the car is so sluggish its like a 4 cylendar. timing chain is next. any other suggestions?

 

Do any codes come up?

 

if you replaced that many thing allready you might as well replace your ignition modual too $13.99.
see what happens...

 

Yes ...ignition module...may be heating up and shorting out,,you may want to check the pick-up coil also.

 

replaced the module p/u coil and dist. oil o-ring. engine runs great and my oil leak is gone thank you. this one had me stumpped. however i have conqured all air conditioner problems you could encounter so if any questions just ask

 

thanks for the update..glad you got it fixed..