very bad 'pinking' when reving hard ???

mgrv8 · Post by **mgrv8** » Thu Jun 04, 2009 7:25 am

i have 3.5 vitesse engine in my mg rv8 replica ,it got a hotwire injuction, my problem is 'pinking' which is very bad if i give it stick as is reving 2000 + upwards If just floor it from say 30mph in 4th gear i cant hear it - its when the revs start to build up ..... my timing is set at 8 btdc ive retarded it to almost 0 to see if it makes any difference,but it didnt. the only thing that missing on my hotwire system is the road speed trasducer which makes it stall at some road junctions , But i was wondering could that make it run very lean mixture that might cause my pinking problem????????? Steve

Ian Anderson · Post by **Ian Anderson** » Thu Jun 04, 2009 9:07 am

an air leak on the inlet side of things

Get a can of easy start

Have the engine idling and spray the stuff around all joints - the revs will rise when it sucks in the easy start

Ian

mgrv8 · Post by **mgrv8** » Thu Jun 04, 2009 5:52 pm

Thanks Ian i will give it a try at w/end ..... steve

mgrv8 · Post by **mgrv8** » Sun Jun 07, 2009 4:17 pm

I have now fitted the roadspeed transducer , and that has helped with the stalling at junctions. I have also checked for air leaks and cant find any, Im still getting bad 'pinking' ???? i checked the CO and that is about 4% at tickover But does go down alot when the revs go up ?? any ideas? other than give up on hotwire and put a weber on it.......... Steve

CastleMGBV8 · Post by **CastleMGBV8** » Sun Jun 07, 2009 5:08 pm

Steve,

Don't know if you spotted this, it's an excellent article on how to troubleshoot a Hotwire system.

http://www.britishv8.org/Articles/Rover-14CUX-EFI.htm

Kevin.

mgrv8 · Post by **mgrv8** » Sun Jun 07, 2009 9:10 pm

Thanks Kevin i will take a look....... Steve

Boosted LS1 · Post by **Boosted LS1** » Sun Jun 07, 2009 9:26 pm

Also, do you have the correct plugs in it?