low rmp off boost launch slight hesitation

japakos

Member +
Yes I replaced that too. The main problem apart from the "off the line issue" is that when I start the car (cold or warm doesn't matter) I get misfire for 30-45 secs on slight load and then it goes away. While misfiring I get lean spots on my wideband. When it cures everything is ok
 

weeJohn

Lifer
Normally if it was a mis fire, the fuel would not be burnt, so AFR readings usually show rich due to a lack of burn. What state are your injectors and fuel filter in again?
 

japakos

Member +
fuel filter is new. I don't know about fuel injectors never took them off to be honest, but isn't it really strange that it does this crap only when I turn it on and for a couple of secs?
 

weeJohn

Lifer
Sticky injector, frees itself up after a while?

Its a long shot, but another set of stock injectors is easy to get on here.
 

Jay

Admin
I had a random find last night on a car that had a misfire for about a minute of starting up then it would clear. Got the odd miss under boost and also a slight bogging down off the lights. Inspected everything the other day but it was still present. Thought I'd retrace my steps last night and although the plugs looked fine one of them had separated where the white ceramic joins to the plug body. It looked completely fine but when you twisted it the white part spun round... A fresh plug sorted the issues out.

Could be something as simple as that buddy so worth going back over it all just in case.
 

japakos

Member +
Well, I did remove the plugs the other day to inspect the gap and they were fine. I am pretty sure that this thing is ignition related but ... how? The only thing that I haven't change is the main lead, the others are trd red ones. I cleaned up the rotor arm and checked the whole distributor and found nothing. I replaced the ignition coil but still the same crap. It's really annoying , it doesn't affect driveability but it's pissing me off big time
 

japakos

Member +
Made a new main lead out of a 0 resistance high quality wire. Of course nothing changed, lean spots when turning the car on some misfires and after a bit it cures BUT, I saw a massive and I mean massive improvement allover the rev band. from middle to high rpm till redline the car pulls like hell , like it gained serious torque. But the problem remains.. anyone? :(
 

japakos

Member +
*** FIXED ***!
It was the damn choke. It was sticking or something. I disconnected the two water lines from the stupid thing , played a bit with the idle screw , set to 800rpm and the car runs perfectly! No more cold start bogs, no hesitation, correct arfs and that was it!
 

Jay

Admin
Good to know, right enoughthe waxstat part can sometimes collapse and cause issues, only ever seen it once or twice though.
 
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