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Model specific boards => Golf mk2 => Topic started by: leeroy20vt on 29 December 2009, 19:45
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this i not in a mk2 its in a raddo but as far as im aware its the same just hope u guys dont mind me posting it here
any way engine has ported and polished head and has had new rings and a rehone all timing is correct on cam/cam belt , but when its under full load after 4000 rpm its starts pinking
has had a fuel pressure check and all was good as far as i know also metering head changed for a gooden and dizzy/ecu
had to retard dizzy timing a bit to make a little bit better
any ideas
cheers lee
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Have you re-timed the ignition off the correct flywheel marker. 6 deg btdc @ idle iirc? What octane fuel are you using, should be 98 at least? Mixture could be a bit weak? If the head has been skimmed the compression ratio will be a bit higher so needs higher octane/richer mixture /retarded timing, could it be running hot? :undecided: Pinking is very bad for the valves, suggest you retard the timing until it stops while you sort out the problem.
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Have you re-timed the ignition off the correct flywheel marker. 6 deg btdc @ idle iirc? What octane fuel are you using, should be 98 at least? Mixture could be a bit weak? If the head has been skimmed the compression ratio will be a bit higher so needs higher octane/richer mixture /retarded timing, could it be running hot? :undecided: Pinking is very bad for the valves, suggest you retard the timing until it stops while you sort out the problem.
cheers m8 it was set up of the rite mark at 6 deg but pinked really bad so have already retarded timing on dizzy
i have been using normal unleaded will have to fill up on super next time round i was thinking fuel mixture to i found a article that shows u how to sort ur mixture out with a multi metre will have a play
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Get some proper management on it instead of that retarded mechanical K-jet rubbish.
Until you have some proper diagnostics on it you're going to be pretty clueless about the cause.
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Has the head been skimmed.
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Get some proper management on it instead of that retarded mechanical K-jet rubbish.
Until you have some proper diagnostics on it you're going to be pretty clueless about the cause.
were can i get it diagnosed any ideas
Has the head been skimmed.
yes m8 it has
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this i not in a mk2 its in a raddo cheers lee
Hi
Please put up a picture of your rado.
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is it a 1.8 or 2.0 rado? the 2.0 uses ke-jet and 1.8 uses k-jet
what fuel are you using? it needs super!
if its a 1.8 go through the setup procedure first, check the fuel pressure, ignition timing and co
im not sure whats adjustable on the 2.0, i think its all done in the ecu using the lambda
oh and ignore the broken record that is diamond hell
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oops, ignore the ke-jet bit, just read its a kr :laugh:
for a quick fix you could just back the timing off
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oops, ignore the ke-jet bit, just read its a kr :laugh:
for a quick fix you could just back the timing off
timings been checked all spot on have backed th timing off on the dizzy but still does it if i back it off any more i will have no power
fuel pressure has been checked i have put normal unleaded init but i will be filling up with super now
any other suggestions
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see what happens with super unleaded fuel first, but failing that
go over the fuel system, do a fiter change, check injectors spray properly and all the seals/top hats are good, check the metering head flap isnt sticking
was the wur tweaked when you checked the fuel pressure? they have been known to go wrong after being fiddled with!
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think the guy did say somethink about the wur but im not sure what that is i will fill up with super and mayby just increase fuel mixture a tiny bit well il see what it says on the emiisions machine first
cheers for your help m8
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no worries, your aiming for 2 - 2.5% on the emissions if you didnt know :wink:
btw the screw is fooking sensitive :grin:
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no worries, your aiming for 2 - 2.5% on the emissions if you didnt know :wink:
btw the screw is fooking sensitive :grin:
and it is the the 3mm allen key screw on mettering head isnt lol
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yep, needs to be quite a long allen key though
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yep, needs to be quite a long allen key though
thought so also found this mayby quite usefull
http://members.dslextreme.com/users/vwtuning/vwtuning1.html
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How much was skimmed from the head as if the compression has been raised that might be a issue.
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How much was skimmed from the head as if the compression has been raised that might be a issue.
think it was miminal m8 but will do a compression test tommorow as well to find out whats goin on
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How much was skimmed from the head as if the compression has been raised that might be a issue.
think it was miminal m8 but will do a compression test tommorow as well to find out whats goin on
Yes would be a good move to start with.
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what should compression be around 150-200 psi ??
cheers
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rite been to garage this morning the co2s ect were a liitle low so turned them up a tad
compression is 200 psi on 2 bores and around 185 psi on other 2 wierd
also checked ignition timing and is spot on :shocked:
any more ideas
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rite been to garage this morning the co2s ect were a liitle low so turned them up a tad
compression is 200 psi on 2 bores and around 185 psi on other 2 wierd
also checked ignition timing and is spot on :shocked:
any more ideas
within 15 psi is ok, if its a young engine it'll still be setteling, if its old thats weepage past valve seats and rings
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cheers danny the engine has done 148k i think if it original but it has had head rebuilt ported and polished to fast road use so it says on reciept lol also rehoned and piston rings i think its done around 600 miles since this has all been done
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it's no where near setteled then, compression results are near as dammit optimal
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cheers danny the engine has done 148k
Hi
Is it just a rado engine or is it a rado shell ?
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so after setting up the co and using super unleaded its pinking exactly the same?
sounds like a fuel delivery problem then
though saying that i have found kjet takes a few days to settle after a tweak
oh dear that post just earned me a geek medal :laugh:
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cheers danny the engine has done 148k
Hi
Is it just a rado engine or is it a rado shell ?
hi m8 it is a raddo lump in a raddo shell lol sorry
so after setting up the co and using super unleaded its pinking exactly the same?
sounds like a fuel delivery problem then
though saying that i have found kjet takes a few days to settle after a tweak
oh dear that post just earned me a geek medal :laugh:
lol u geek haha :laugh:
yes m8 seems the same i have even retarded timing a little more altho its lackin even more power its still pinking will run it for a few more days like u say may settle down but i dout it
my next option is find some were that can check fuel pressure under load i think ?
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Hi
Thanks for confirmimg that it is a rado shell.
There is a fuel pump inside the fuel tank and one outside. If the rado is a 1990 one, then it may be time to change one of the pumps at a time.
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Hi
Thanks for confirmimg that it is a rado shell.
There is a fuel pump inside the fuel tank and one outside. If the rado is a 1990 one, then it may be time to change one of the pumps at a time.
yes i was thinking this but fuel pressure on tick over is good but dont know under load ?
does any one know if the intank pump is the same as a mk2 8v or would it have to be a 16v
also sorry m8 i didnt see ur request for a picy so here it is
(http://i131.photobucket.com/albums/p319/leeroy8v/IMG_2495.jpg)
still got the mk2s tho lol
(http://i131.photobucket.com/albums/p319/leeroy8v/P091228_135542.jpg)
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it's no where near setteled then, compression results are near as dammit optimal
does that mean there likly to fall a bit and sort its self out ?
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Hi
Love the photo of the rado.
Are the camshafts original ?
Has the pinking been there from the start since the head was flowed ?
Was the camshaft chain changed ?
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Hi
Love the photo of the rado.
Are the camshafts original ?
Has the pinking been there from the start since the head was flowed ?
Was the camshaft chain changed ?
cheers m8 its not a clean as it looks in the pics but hayho
as far as im aware it started pinkin when all the work was done
camshafts are original
and not sure on the chain m8
lee
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just been looking thru all the reciepts that came with car and ithad a new lift pump and fuel pump fitted last year so that rules them out i think :undecided:
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Hi
What was the compression in cylinder 3 and cyl 4 ?
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1 200
2 185
3 185
4 200
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Hi
The only thing I can think of then is the injectors.
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Hi
The only thing I can think of then is the injectors.
goin to have to whip them out and check just looking for a guide as to what the spray pattern ect should be
cheers
lee
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Hi
You are looking for a nice conical sparay, but more importantly getting the same amount in each container from all the injectors.
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so what do i do get some container 4 of mark up with some measurements put a injector in each and crank the car over for how long ?
cheers lee
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Hi
Not more than 10 seconds to save the starter motor.
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you dont crank it, that wont get you anywhere.
what you do is bridge the fuel pump relay socket with a chunky bit o wire, then you have to lift the metering head flap up by hand.
ideally have each injector in its own container, so you can check both the spray pattern and delivery volume.
if 1 injector is out compared to the rest, swap it with one of the others. if the problem moves with the injector replace all 4 injectors. if the problem stays on the same spot its the fuel line or metering head.
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cheers rubjonny
will let u know miy findings when i get round to it
cheers lee