PDA

View Full Version : S13 High RPM Hesitation!


RandallSharp
06-19-2013, 08:44 PM
My car just started doing this the other day and I'm a bit lost because it seems intermittent. When I was cornering in 2nd gear at about 3300 rpms, the engine randomly paused. Didn't feel like a stall or misfire. Just like time stopped. It immediately picked up and ran fine. Today it got worse. I was driving at about 60 in 5th at 2800 rpms when I started to accelerate. At about 3000 rpms it started misfiring like crazy and wouldn't accelerate. Felt like a fuel cutoff, but wasn't. It wouldn't go past 60 due to the condition. I'm thinking fuel pump, maf, or ecu? Anyone else experience this?

UPDATE:
It's definitely not the maf. I swapped it with my friends and the problem is still there. It gets worse the more you depress the pedal. On wide open throttle, the car will crawl to 4500 rpms and just stays there like it's restricted. The plugs were brown and toasted. Fuel pressure after the filter was around 33, which is good. So now I've swapped maf and ecu plus I tested the fuel pressure and all checks out. Help me please!

I checked the tps today. Needs adjusted (0.649 volts closed) but it checks good and works well.

New injectors when I bought it. Filter is a clean. New plugs, wires, cap, and rotor. Also ran some extra ground wires. Took the catalytic converter out as well. I think the fuel pump theory may be correct in a different way. As in, there's no clog, but the 22 year old pump just can't give me the volume at WOT.

Also considering a stretched timing chain or bad distributor. Man I hope not.

aga
07-05-2013, 12:26 AM
its certainly ignition related. check grounds, coils, if you have distributor check cap and rotor (for cracks etc), and spark plugs too. if you have a friend with the same car, try switching coils etc.

Croustibat
07-05-2013, 02:47 AM
It just is a boost leak ...

BTW 3000rpm is not high rpm, not even on diesel engine standard.

ekaio808
09-25-2013, 12:09 AM
My car kinda did something like this every now and then it pulled until 3000-3800rpm then loses power and backfires. Checked ecu code 34 Knock sensor...GREAT. then i popped the hood and looked at the knock sensor and it's cracked. Replaced KS and now it works just fine. I dont know if this is your problem but i hope it will help.

Croustibat
09-25-2013, 02:30 AM
I hope he DID find the source of his problem, as it was 4 months ago...

Mikester
09-25-2013, 06:32 AM
LOL

My theory: He used octane booster or some other fuel additive... 'Plugs brown and toasted" pretty much told me...