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Low RPM stutter
Posted: Fri Apr 01, 2005 4:54 pm
by Nicholas
My 85' GTV6 2.5 sometimes exibits a temporary stutter when under load below 2000 RPM.
I have checked all the settings on the EFI system and the HT leads are brand new (Magnecor).
Any ideas
Posted: Fri Apr 01, 2005 9:26 pm
by junglejustice
Mine was doing the same... It was also running very poor when cold! When the rpm is at or below 2000 (even once warm) and I try to apply light load, it would surge and sputter unless I went FULL throttle then it would just maybe surge a bit and then jump and pull right through it!
Very noticeable with light throttle increase at low rpm…
Vacuum leaks - buy the kit from Greg Gordon - about 120 bucks and it will smooth this puppy right out...
Also, the new GoTech has made a HUGE difference in how the car runs, throttle response etc.
The power will also be there as I fine tune the mapping.
Posted: Mon Apr 04, 2005 4:37 am
by Barry
Nick,Trade secret # 503!!!
Replace your rotor and the stutter should go away.You might have to replace the dizzy cap as well.If its a Bosch rotor you might get away with simply cleaning it very well-dont scrubb off the shiny insulating coat.If its Echlin,replace.
Let me know how you fare....
Barry
Low RPM stutter
Posted: Wed Apr 06, 2005 3:30 am
by Nicholas
Cap and rotor button have been on the shopping list for a while now.
I have cleaned them a few times in the past but I don't know how old they are and they should be replaced.
I'm replacing the rear engine mount tomorrow so I'll do the cap and button as well.
Posted: Mon Apr 18, 2005 9:09 pm
by Barry
Nick,Wassup?You sort out your problem??Let us know mate.......
Posted: Wed Jul 20, 2005 1:31 pm
by Nicholas
...after long absence, the problem seemed to stem from my Magnecor leads and the green wire that runs from the dizzy to the silver box (Spark Amp). I pulled the dizzy apart cleaned and reassembled remade connections on green wire and went back to OEM style 7mm copper leads. All seems to be well now !