93 240sx S13 Hesitates when accelerating on low rev

[marryson]

I have posted this before but i thought I fixed the problem..... so here i am again. my car would hesitate (Rock back and forth) when accelerating below 2000rpm. This started happening when my coolants were leaking and I was driving for 10-20 minutes without even knowing about it. when I got home, there was light smoke coming out of the engine somewhere. when I fix the leak and replace my coolant, everything is fine except for the hesitation issue. I changed my spark plug but that didnt help. any ideas ??

[drifter1992]

my buddy had a hestitation, he changed his plug wires and it helped but still had a bit of hesitation and then changed his igntion wire from the distributor to the igntion coil and it went away, so maybe try that

[marryson]

thank you very much for replying to this old post, I will give it a try thx

[S13-1UZ]

Check the egr or egr backpressure valve with a vacuum tester. It caused hesitation on my KA S13.

[RV_S13]

Plugs, wires, check your timing. It's supposed to be 18-22* btdc. Mine was set at 25. It idled smooth but hesitated like a mofo. Once I set it back down I gained a ton of torque back.