Hi all I have recently bought a 93GQ 4.2 pet with efi that started to run rough while driving and its graduly getting worse its more of a chugging misfire now like its short 2 cylenders I recently replaced leads,plugs and fuel filter , should I replace dizzy cap and button to eliminate that from the list of things to check
Last edited by NissanGQ4.2; 15th September 2013 at 09:44 AM. Reason: Title Change
Read this, will give you alot to chew over.
http://www.nissanpatrol.com.au/forum...er-accleration
IF IT'S NOT A NISSAN.
THEN IT'S A COMPROMISE
MADAZZ (15th September 2013)
checked all that and just replaced dizzy cap and button and no change
Check leads in the dark for shorting, do you think its electrical?
Also inspect all vacuum hoses
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
MADAZZ (16th September 2013)
all electrics are new inc coil it sounds like a vacuum leak but I cant find it even spraying start ya bastard around manifold while running and no change ,I did have a wet spark plug from fuel so got new leads could my dizzy be stuffed and not sure how to check it, there isn't a lot of vac hoses on it ,someone that had no respect for a patrol owned it b4 me and its only done 180 000 km
Last edited by MADAZZ; 16th September 2013 at 09:15 AM.
Is it using water????
MADAZZ (16th September 2013)
no its not loosing water and oil is fine it is an automatic is there any vacuum lines to the gear box ?
just emptied my new fuel filter and its full of rusty dust so injector clean might help I hope
Seems like it needs a full service, start by changing all filters, then oils
that way you'll have a starting point for future services, vacuum line is cheap.
But a wet plug would tell me dizzy cap or that lead is U/S, There is a rotor button conversion I think too
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
MADAZZ (16th September 2013)
Still got me stumped ,I have replaced all electrics from coil to plugs fuel system cleaned from tank to injectors ,compression test no help ,plug 4 is wet or not burning fuel but lead has spark ,injector plug power is good ,timing is spot on ,not using water , F it still chugs like a steam train, cylinder 4 plug is like new but wet with fuel or oil. I was only dragging the kids around the beach a week ago on a sand board now IM F_____KED for ideas im sure someone has had this problem I hope, all cracked vac lines have been replaced, I can degrease engine running and it doesn't stop or get worse
Last edited by MADAZZ; 22nd September 2013 at 09:08 PM.
Posting Permissions
Reply With Quote