MY87 5 speed running issues

My guess is the injection brain for sure... You might need another mechanic if he does not have a spare brain on hand! My mechanic keeps one on the shelf ready to go at all times! Of course not only does he see my 10 928's he also has one (used to have two) of his own and he works on virtually all the rest of the 928's in Austin! He is the 928 stud here in town!

pcar928fan;11959 wrote: My guess is the injection brain for sure... You might need another mechanic if he does not have a spare brain on hand! My mechanic keeps one on the shelf ready to go at all times! Of course not only does he see my 10 928's he also has one (used to have two) of his own and he works on virtually all the rest of the 928's in Austin! He is the 928 stud here in town!

Only issue with that I had a LH loaner a while ago for a couple of weeks and none of the symptoms improve. He works for the dealer so he doesn’t have a spare in hand. Thanks

Hmmmm... Maybe that was a bad LH too. Generally speaking though when an LH brain fails it is usually all or nothing. Car runs fine or it does not run at all. At least that has been my experience. So, while I would look at your LH, it sure might be something else.

I can't wait to hear what the final answer is to get this thing fixed!

Swapping ignition boxes wouldn't be necessary IMO. You could just as simply, and much more quickly, verify spark and timing on your car as it is now.

If you are not getting spark it could be brain, coils, whatever else... It would tell you which part of the equation is acting up though.

pcar928fan;11964 wrote: Hmmmm... Maybe that was a bad LH too. Generally speaking though when an LH brain fails it is usually all or nothing. Car runs fine or it does not run at all. At least that has been my experience. So, while I would look at your LH, it sure might be something else.

I can't wait to hear what the final answer is to get this thing fixed!

James
I'm sorry for the confusion. Earlier post when I said the car crank but no start that's partially true. If we crank the car multiple times it does start with rough idle and it will finally stabilize with 1200 or more idle.. It will run and can be driven but hesitates. If the car stops it's difficult to get it to run again but not impossible. The time I replaced the LH with another I had 2 of them but neither one improve the issue.
Ariel