exhaust banging under car
Posted
#1471140
(In Topic #194760)
Old Timer
Hi have a car with a heavily modified abf engine. It's been polished and ported, re mapped with high lift cams and a k&n air system.
If while driving I'm just feathering the throttle the exhaust bangs the underside of the car and I can feel it at my feet while the car kangaroos. If I give it a little push on the throttle it goes away. It's always been like this since iv had it so just put it down to the cams and other engine mods but recently seems to be doing it more and starting it is taking a little longer to get it going and hold revs. What's your thoughts guys rubjonny ?
If while driving I'm just feathering the throttle the exhaust bangs the underside of the car and I can feel it at my feet while the car kangaroos. If I give it a little push on the throttle it goes away. It's always been like this since iv had it so just put it down to the cams and other engine mods but recently seems to be doing it more and starting it is taking a little longer to get it going and hold revs. What's your thoughts guys rubjonny ?
It's all shits and giggles until someone giggles and shits
Posted
Local Hero
Adjust it so it doesn't bang! Its probably been poorly fitted at some point, if left to hang on its own will droop then bang on something, needs to be lifted up then clamps tightened.
Posted
Old Timer
So it could be just that it all needs nipping up? What about the stalling when starring?
It's all shits and giggles until someone giggles and shits
Posted
Local Hero
How was it remapped?
Posted
Old Timer
Posted
Old Timer
paul_c said
How was it remapped?
To be honest I don't fully know as was done before I got it but all aimed at the top end.
It's all shits and giggles until someone giggles and shits
Posted
MOTY 2013
what exhaust setup is it, most are designed for a KR lump so they dont fit well on an abf at all. as said get under and see whats occurring
as for running issues what engine managment are you using? the abf ecu isnt a fan of lumpy cams it messes up the vacuum signal to the MAP
as for running issues what engine managment are you using? the abf ecu isnt a fan of lumpy cams it messes up the vacuum signal to the MAP
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Posted
Old Timer
Righto will get it on a ramp and have a good look!!!!
It's all shits and giggles until someone giggles and shits
Posted
Old Timer
Don't know if this helps but have a look and see what you think. This a list from last owner.
ABF Engine 190bhp.
Fully rebuilt top end and bottom end. Lightened and balanced crank. rods. pistons. flywheel etc. upgraded valve springs. black diamond uprated clutch and bearing. . Newman high lift camshafts & adjustable vernier pulley. remapped. all set up on the dyno by TSR Performance in Somerset. K&N 57i kit. . full straight through Milltek stainless exhaust system. gas flowed cylinder head. ported and polished inlet manifold and throttle body.
ABF Engine 190bhp.
Fully rebuilt top end and bottom end. Lightened and balanced crank. rods. pistons. flywheel etc. upgraded valve springs. black diamond uprated clutch and bearing. . Newman high lift camshafts & adjustable vernier pulley. remapped. all set up on the dyno by TSR Performance in Somerset. K&N 57i kit. . full straight through Milltek stainless exhaust system. gas flowed cylinder head. ported and polished inlet manifold and throttle body.
It's all shits and giggles until someone giggles and shits
Posted
Local Hero
Sounds like it needs the remap looking at again for cold start/warm start/warm up phase.
The other thing it could be is a loss of compression, that will make starting more troublesome.
The other thing it could be is a loss of compression, that will make starting more troublesome.
Posted
Old Timer
Thanks paul
It's all shits and giggles until someone giggles and shits
Posted
MOTY 2013
what engine management has it got? as i say lumpy cams can throw off the abf map sensor
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
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Posted
Old Timer
rubjonny said
what engine management has it got? as i say lumpy cams can throw off the abf map sensor
I really don't know. If I take a picture would that help?
It's all shits and giggles until someone giggles and shits
Posted
Old Timer
After getting it on the ramp found the centre rubber was broken so that's now sorted. As for the stalling cos it sometimes does it while driving if I take it out of gear, could it just need a new fuel filter?????
It's all shits and giggles until someone giggles and shits
Posted
MOTY 2013
yeah if you can find ecu and piccy it that may help?
not sure if a filter would help, but it certainly wouldnty hurt
not sure if a filter would help, but it certainly wouldnty hurt
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
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You'll need to sign into google/gmail for the link to work! (its free!)
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Posted
Old Timer
Posted
MOTY 2013
thats abf i see there are some bare wires there, looks to be the ignition live for ecu? if so and its shorted it may have popped a fuse. the isv is usually on the same fuse so this could explain the stalling
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
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Posted
Old Timer
Thanks for that. Will tidy up the wires and check my fuses. By any chance you dont know what number fuse it is do you? Thanks pal
It's all shits and giggles until someone giggles and shits
Posted
MOTY 2013
it depends on how the loom was made, but 17 and 18 a good start
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
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Posted
Old Timer
No blown fuses
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