Engine Now Running....like A Jet Engine

[pugpete1108 62 1 Cars]

after loading a new map this morning i have got the engine running, unfortunatly its running to well i say too well if it was a jet engine.

 

when it fires up the revs carry on going, i switched it off at 4k for fear of popping the engine.

 

after a bit of reading i have concluded i have an air leak or two or the map senor is not connected properly.

 

the kpa i am getting on 'idle' is about 98kpa when i gather it should be alot lower than that say 30-35kpa is that correct??

 

i'm not using the stepper valve and have supposedly bloked it off? but not so sure now. is there a way of blocking this off totally?

 

other than that its the milk bottle top bodge i used for blocking off the resonance chamber hole on the inlet manifold leaking air.

 

any ideas?

 

pete

[[L'e$kro] 2]

after loading a new map this morning i have got the engine running, unfortunatly its running to well i say too well if it was a jet engine.

 

when it fires up the revs carry on going, i switched it off at 4k for fear of popping the engine.

 

after a bit of reading i have concluded i have an air leak or two or the map senor is not connected properly.

 

the kpa i am getting on 'idle' is about 98kpa when i gather it should be alot lower than that say 30-35kpa is that correct??

 

i'm not using the stepper valve and have supposedly bloked it off? but not so sure now. is there a way of blocking this off totally?

 

other than that its the milk bottle top bodge i used for blocking off the resonance chamber hole on the inlet manifold leaking air.

 

any ideas?

 

pete

 

 

If it revs, you are right looking for air leaks

 

-did you tighten the manifold to the head? (don't laugh it happend to me with my itbs)

-I'm not running the idle valve on mine and it idles correctly after a couple of minutes: remove it and plug it off. To ensure proper sealing use some loctite flange/gasket sealant

-also plug the servo/vacuum pump take off, just to see if it changes, in case it leaks at the servo

-try to use an Alpha/N strategy instead of the map one to see if it runs better, in case your map sensor is defective

 

Nicolas

[pugpete1108 62 1 Cars]

' date='Nov 24 2009, 02:30 PM' post='1013813']

If it revs, you are right looking for air leaks

 

-did you tighten the manifold to the head? (don't laugh it happend to me with my itbs)

-I'm not running the idle valve on mine and it idles correctly after a couple of minutes: remove it and plug it off. To ensure proper sealing use some loctite flange/gasket sealant

-also plug the servo/vacuum pump take off, just to see if it changes, in case it leaks at the servo

-try to use an Alpha/N strategy instead of the map one to see if it runs better, in case your map sensor is defective

 

Nicolas

 

thanks for the advice , i think i may have cracked it now i have changed the size and connection of the map pipe and it now revs alot lower on idle (cant see exactly as i forgot to take my laptop round the garage). but' its not at warp speed which is good.

 

still got some backfires though?

 

i will still remove the idle valve and block it off.

 

are you running the map from the large take off near the tb? or along with the vacuum servo take of on the plenium?

 

as for the other post i got a spark and fuel map from phill ringwood who built my ecu and it fired up almost straight away.

 

i should really change my sig as i'm running std inlet now not tb's