16v twin 40s
Posted
#679918
(In Topic #82067)
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16v twin 40s
I have just put a KR engine runing twin 40s in my mk1 gti,the problem is that it wont start,it keeps backfiring really bad! i have used the 16v loom,coil,and ecu,ive wired the green on the - ,the black,black/white on the + of the coil,ive also kept the gti wires on the coil aswell,i seem to have spark,not sure if it anough tho.
The fuel side i have fitted a uprated pump,so i know i have planty of fuel,but it still backfires!
I would be very greatfull if some one could give me some help.
The fuel side i have fitted a uprated pump,so i know i have planty of fuel,but it still backfires!
I would be very greatfull if some one could give me some help.
Posted
Old Timer
sounds like the timings out matey, or you may have the leads on wrong :dontknow: defo check the timing, and the leads are you sure the carbs are jetted up proberly?
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Posted
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Thanks for answering!the leads are in the right order,the carbs came with the engine when i bought it,the guy said it ran good,i will cheak the timing tho.Thankyou for your help
Posted
Local Hero
Posted
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Thankyou for your help i will check the dizzy out!
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when you say uprated pump have you've fitted a lower pressure one like a facet one?
Posted
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Yes it came with engine,and carbs i wired it up on the oringal gti wires,thanks for your reply
Posted
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just wondering , dose it backfire through the exhaust or througt the carbs, .ie. spit the fuel out the carb throats.
9A,027,278,02A,mikuni r1 carbs,megajolt 36-1,R1 pump,lc1,02J shifter,9J ats…
Posted
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It backfires through the exhaust big time,more so when i give it more throttle.Thankyou for your reply
Posted
Local Hero
svr6 said
It backfires through the exhaust big time,more so when i give it more throttle.Thankyou for your reply
Sounds like lots of fuel in the exhaust manifold burning off compression - i.e. spark or valve timing is way out
Posted
Local Hero
Was the engine complete when you put it in or was it stripped?
I would agree that your timing is out somewhere, though if the engine was all together and you just dropped it in… :dontknow:
What have you got controlling the ignition? Mk1 TCI or 16v? Or has it got an old "points" dizzy converted to fit?
I would agree that your timing is out somewhere, though if the engine was all together and you just dropped it in… :dontknow:
What have you got controlling the ignition? Mk1 TCI or 16v? Or has it got an old "points" dizzy converted to fit?
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Posted
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Thanks for you info, i overhauled the engine before i put it in,all the timing marks lined up,im going to cheak again tho just to make sure! im using the 16v dissy,and loom witch i think ive wired it up ok,cause ive got spark.
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