misterstag

car specs: 82 280zx, n/a.

I recently installed the headers, downpipe and new CAT on this car. After the mechanic installed it, worked find. The next day car struggled to start. Once it did, warmed like normal. Now it wont turn over. The only thing I replaced is the fuel filter, and Im sure its on right.

suggestions?

NismoPick

An engine needs 3 things to start:
-Proper fuel
-Proper spark
-Proper compression

Does it have proper fuel delivery to all 6 cylinders? Proper spark to all 6 cylinders?

Skully

It doesn't turn over as in, starter doesn't move the engine? Seems like you just drained your battery in 2 days. From the information you provided.

misterstag

the battery is good. Its brand new, and spark is strong to I tested that so there is a leak somewhere in the compression. I put new headers on a week ago and it worked then but nothing now. So I think it might have something to do with that. Maybe a vacuum line? what else could it be?

NismoPick

That didn't really answer my questions...

Did you verify that each spark plug is receiving spark?
Did you verify that all 6 injectors are firing?
Verify fuel pressure?

Skipping from spark to "must have a compression problem" isn't following direction.