1992 miata hesitation under 4200rpm
#1
1992 miata hesitation under 4200rpm
I just bought a used '92 Miata with 170,000 miles as a project. It's a 5 speed.Themotor seems to run very nice. No tapping or rattling, smooth acceleration in neutral. Sounds great.Here's the problem: When I'macceleratingthrough the gears the car seems to hesitate and and surge until I reach 4200rpm and then it pulls like a horse. During acceleration the engine sounds like it's firing properly and the rpm's increase evenly butthe ride is jerky and uneven. I changed the spark-plugs and wires. I replaced the fuel filter. I've run a tank of injector cleaner and I even sprayed the crap out of the throttle-body with throttle-body cleaner (but did not remove it, just sprayed the paddle anddown its throat). I've read a bunch of opinions on similar problems but most either don't hold water or I already tried them. I don't think it'sa weakfuel pump or it would get worse at higher rpm's... right? The O2 sensor has been suggested but I believe I would have a "trouble" light letting me know... right? The clutch is a little high but it seems to grab like it should. Anyone know what my problem is??? Besides not being smart enough to figure this out?! Thanks in advance!
Thread
Thread Starter
Forum
Replies
Last Post
Nisemarie
Mazda Miata (MX-5)
1
11-10-2012 09:01 AM
Demar002
Mazda Miata (MX-5)
5
01-17-2007 05:20 PM