<- 86 NA GXL
I re-grounded my ECU to fix the hesitation at 3800. The wires looked still good new, and in good condition. I added ground wires to those existing wires anyway and attached them to the fire wall. I took it for a test spin after~ It minimized the hesitation to the point where you will not notice it unless your really really trying to feel for it. But i can still barely feel a very small hesitation. I checked my other grounds, and they all like almost mind condition. Does anyone else have any other ideas? What else can I do?

 

have your fuel injectors been cleaned recently?

how do you know your grounds are "good"? are you just looking at them? are you doing voltage drop tests?

I had to re-solder my ecu grounds twice b/c first time I made crappy joints and hesistation was still there. my car still has very slight hic-up sometimes but thats just b/c the secondary injectors are coming on line and car is very modified.

so... looks like you can re-do the grounds again, clean injectors (send to rc engineering), or live with it. only very small chance that problem is related to something else.

good luck
Mike

 

yeah man just replace your ground wires all together, dont just hook new wires to the old ones

 

Good thing to do is check and clean your AFM connection

 

I had the hesitation for years and have tried almost everything. No help. My mechanic got a junk 87 rx-7 amd he let me have the ecu. PROBLEM FIXED!!