Evening people! Right! now that i'm bored with getting pissed constantly decided to have a look at fixing my car for the summer!

Basically 5k and it starts missing! change gear and it momenterilly fires on three for a second or two til it clears and it hits 5k and it misses again! Altho after cruising at say 50 mph in 5th for 5minutes then dropping it to third and giving it full throttle it will pull to the limiter without missing at all!

So far have tried....

Leads
rotor arm
distributor cap
2 sets of plugs 3 different gaps!(902's NGK 9's at .5 .6 .7mm)
coil (and power feed to coil!)
ignition amp
Water temp sensor(runs at 87degs)
Thermostat
Charge air sensor(runs at approx 22degs)
crank, phase, map sensors(all tried with direct feed to ECU)
different ECU's (p8 and L8)
different Chip (2 no. 1 blues chip 1 grey chip)
different Injectors
No faults showing up on Pectel monitor during miss fire!
Block tested for leaks(also ran without water cooling on turbo and no pressure cap still missed as bad)
Fuel pressure is fine all the way up!
The intake pipe to the compreeor housing is 3mm Stainless steel so that aint collapsing!
Boost pressure seems to have no effect on it(stil misses at 20 psi like 32psi)
There are no multiplugs on the inner wings been replaced!
and all the connectors are lubed up!

Any idea's people?

 

Low voltage to ECU?

 

Big Andy W,

Are you running a standard fuel pump?

Or has the in-tank fuel pump been changed to an uprated type?

 

Checked and ok!

Its running a PHIL supplied Bosch RS6 Number!

 

 

Can you drive gently through it or will it misfire even under slight load?

 

surely a job for a professional now

 

It does it regardless of load i did try it with half throttle!! it does seen to stop missing around 6.3k roughly then the limiter comes in shortly after!!

Hmm i'm a piss head not an electrician!!

 

Have you checked the loom with a multimeter?

 

Probably answered my own question....

 

Bypassed the three main sensors but will ask question tom!! Loom problem was a potental!

 

fuelling under load ?? has it been checked ??

fuel pressure under load ?

does it have a small bag type thing on the bottom of the filter pick up mr vodge ?

 

its just a mesh screen built into the base of the big bosch pump!!

 

the only problem with that is , you may check a ressistance and find it to be ok when the systems it runs have no load, ressitance checks cannot be carried out when components are connectecd unless direct and specific values are known, so you may have a ( for instance) 1.0mmcsa cabe thats frayed to fook , only 2 strands left , check it disconnected and with a mm, you will see a circuit , and 9 times out of ten ressistance will be low enough for you to say its ok , now send 4 amps down it ( if it doesnt become a fuse ) then PTC will affect it to then give you a very high ressistance !!


you have to be very careful and know what your doing with electrics

 

if fuelling and pressure are fine then it wont be that gauze, had one on a car years ago , gave similar probs , used to suck itself intothe pump when runing !

 

He does!! i don't so i'm not touching it!!

 

 

You're getting quite good at this electrical shite Mr K!

 

i would hope so ivebeen doing it for 14 years now

and making a serious living out of it for over 6 years !!

 

Looks like I'm not far behind you! 10 years and 7 on electrics on and off, the last 5 years being permenantly on electrics.

 

Just thought I would add....

Obviously an old git like yourself will have a few years more experience than a young pup such as my good self!

 

tbh its the only way you can actually make any money in the motor trade , and ive always een good at it , so qualified me to be master techs for two diff franchises

the way things are going ( and i glad tbh) is everything electric/electronic, much better than getting your hands dirty !

wont be long now , dealer standards are very high in terms of qualified staff , the higher qualified with the best experiance teh higher the money you demand - and its all looking very rosy !!

 

you chhhhhhhhhhhhhhhhheeeeeeeeeeeeeckkkkkkkkkkkkkkyyy young cnuuuuut !!!

get the brews made!!

 

btt, on behalf of andy

 

and again

 

phase sensor?

 

ignition amp?

 

Tried already with seperate feed to ecu on phase sensor
Tried different ignition amp but not re wired!

thanks anyway boys!!

 

come to any conclusion yet andy?

 

Yes! Lookin at the computer screen makes my eyes hurt!

Need a good screen saver! have you got any good pictures of ***

 

heres a good interim plan to sort it .................................................. ......










































get back down the pub

 

have you tried a heavy gauge feed to the fuel pump, the std wiring and connectors may be causing volt drop along the length and causing teh fuel pump to give poor delivery flow/pressure...?

other thing that isnt on the list.... is the fusebox. have u had the battery off and checked the 3 seperate feeds to the fusebox, mine had all melted and coroded

other thing is that it could be an bad earth from the ecu to the inlet manifold.

1 more thing , have u popped open the rubber boots that go on the coil, thse can corrode a lot in side and so cause low voltgae to the coil....

 

think your funny eh, i know what those 3 stars stand for and so does
graham, now that i have just showed him, your in yard all day tommorow
on the punch i have been told to tell you

 

Will get these checked tomorrow altho the coil one has been eliminated by direct wiring!

Cheers!

 

Gprs bill to high on phone so settling for beer in front of computer!

 

Big Andy W,

Andy who is *** ??????

Is she fit?

 

OI, *** IS NOT FIT, SHE IS 5 FOOT TALL BY 4 FOOT WIDE WITH A SKIN HEAD

 

OK, just wondered - thats all

 

we all no he is lyin

 

engine phase sensor in the wrong position