well , i finally decided to get mi polished plenum and 555cc injectors fitted after fitting them car started rough lumpy ovefuelling(yes i put 555cc chip in tried 2 of em know goood one) all new coil packs and injector connectors fitted 0 psi on rest pressure.traced fault to bottom o ring not in right doooh!! and pissing fuel straight down cylinder ahh thats it.now 40 psi

plenum back on for 2nd time, car won't start ffs flooding like fook just about trying but never firing up, smelt severe petrol in breather/dumped oil &filter as it was contaminated badly.

still no good/left with plugs out overnight , still no go tries a litle then dead.

plenum off and spare fuel rail with injectors of a recent running zed engine.

still the same wtf??

ecu fault code 55/draine petrol as I had topped it up with gallon can and tried again.nope

thought put 555cc in with less duty cycle so will run leaner and eventually got car started, but smoking black neat fuel out stinging mi eyes and lumpy,

then tried letting idle dead, won't start again

checked all fuel dampers right way etc,

thought it might be afm but it should run without it to start/ also tried another ptu in desperation, all earths fitted, tried a cas unit and injectors work etc/duty cycle on cranking with data scan at@60

so now even I'm at a loss ......looks like a gallon of petrol and a match cos i;m fed up with it now

 

richard :rant:

I would take everything that you can back to standard e.g. Is the car fitted with a traction control that works on the fuel control side? Is the fuel pump setup as standard. Is the pump voltage contol system working correctly. Is the fuel return to tank line clear. Is all the wiring harness OK. The answer is there and we all want to know whats up with the little B******.

Car now runs apparently :)

Car now runs apparently :)

 

c'mon then anyone, spill the beans, lol

smithy

All I know is that Rich cranked the car for 5 mins plus and eventually it started. Sounds like the lifters needed some time to 'jack out' and give full valve lift? Am sure Rich will be around later to give a full break down. Constantly cranking a car isn't unusual on a rebuild but never heard of it on a job that doesn't strip the whole block down...

 

Side note: Z32s don't tend to need a massive amount of cranking after a rebuild either, other engines do.... Makes this one even weirder!!!!

well its\still a mystery to me as to why???

I finally managed to get it running after severe cranking and no throttle until it catched then holly cow...had to keep it revving at 3k to keep it running, but Icouldn;t see mi car for black smoke ffs mi eyes were watering it was that bad. after about half an hour the missfiring and spluttering/smoking started to calm down but car was running very rough but it would restart, I data scan data logged it running, and took it out for a spin to cruise it to aid clearing it, which it did....wtf???

checked co% on mi 4 gas anylyser and only gor 4%n/s and 7% o/s hydrocarbons abour 300ppm hks superafr set to zero correction, its still not smooth at moment but gonna give it a run to work tom`

the only conclusion I can come up with when my initial 555 went in and the lower seal was pissing fuel into inlet as far as the engine oil (which I did change by the way

) then it must just have somehow held the fuel in either crancase or lower plenum, even though I blew all cylinders out with airline as for the lifters I don't know I guess I should have done a compression test but having not even done anyhting with internal engine parts i don't know. this has severly tested my 23yrs of being a mechanic to the limit AND I'M NOT HAPPY, now i,m down to 13 minutes to get plenum off lol

down to 13 minutes to get plenum off lol

 

Well done !!!

 

When I had problems, I did get it running on 3 cylinders at one stage and with WOT could muster an impressive 1900 RPM. It would not clear though, almost like it goes overboard trying to correct itself and gets it wrong. I thought with that amount of air going through it that it would have dried the remaining wet plugs. Dunno, sweet as now though.

car seems to run better today, seems to get better the more i use it, appart from now on full boost its acting weird, boosts up to 15 psi as normal foot down then boost drops off so gonna do a boost leak check lol must have an air leak somewhere ffs probably a boost hose with taking em off so many times lmfao

richard

well a decided to put the 555cc back in and hey presto no problems,,, so the only thing that caused mi car to die must have been very badly flooding ffs I would never have thought it would be this bad lol

I would :) Murphy is a b@$t@rd