boost problems in 4th & 5th help?
29 October 2002, 07:20 PM
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iv gota real problem wi my turbo in 4 & 5th gears, its like a lag my car sets off as nomal then the lag kicks in then it sets off again its like that all the way though the revs. start stop start stop etc. any ideas how 2 stop it? went 2 the main dealer they did help any. all help welcum? cheers michael
29 October 2002, 07:41 PM
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A slight onset of overboost perhaps?
I'd have a go at the wastegate solenoid with a can of brake cleaner first (they do have a tendency to get sticky with gunk of all sorts).
Have you changed exhaust system by any chance?
A bit of play with restrictors, and adjustment of the wastegate actuator will sort it if the cleaning session doesn't...have a word with the zenmaster of restrictors (John Banks) - he'll know what to do.
/J
I'd have a go at the wastegate solenoid with a can of brake cleaner first (they do have a tendency to get sticky with gunk of all sorts).
Have you changed exhaust system by any chance?
A bit of play with restrictors, and adjustment of the wastegate actuator will sort it if the cleaning session doesn't...have a word with the zenmaster of restrictors (John Banks) - he'll know what to do.
/J
29 October 2002, 07:52 PM
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As J except zenmaster bit.
If the brake cleaner doesn't work buy/borrow a cheap boost gauge or get a run on someone's Delta Dash and see what the boost is doing.
Have you got any modifications on the car?
Decat and cold weather are enough to make some overboost like this.
If the brake cleaner doesn't work buy/borrow a cheap boost gauge or get a run on someone's Delta Dash and see what the boost is doing.
Have you got any modifications on the car?
Decat and cold weather are enough to make some overboost like this.
30 October 2002, 11:28 AM
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cheers il give the brake cleaner a try. iv just changed the exhaust has it happens + decated centre. BUT the problem has bin there b4 the change of exhaust. its a real pain. so waste gate problem then. cheers. think il get the dealer 2 hava look again. i dont fancy messin with my p1 much.
30 October 2002, 12:28 PM
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The fact that you've opened up the breathing won't make the problem any better actually....it'll most likely multiply it by a factor of 10 or so. 
Really, have a word with John Banks here and he'll help you out with a proper restrictor/actuator setup.
After all it's a matter of getting the balance right with flow restriction, and adjustment of the actuator.
I doubt most scooby garages would know what to do with it...
/J
Really, have a word with John Banks here and he'll help you out with a proper restrictor/actuator setup.
After all it's a matter of getting the balance right with flow restriction, and adjustment of the actuator.
I doubt most scooby garages would know what to do with it...
/J
31 October 2002, 11:33 AM
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The best way IMHO to sort it accurately (bar remapping the ECU ) is to fit a restrictor valve to replace the original restrictor. There is a very long thread on this by me somewhere in Drivetrain with all the nauseating details
) is to fit a restrictor valve to replace the original restrictor. There is a very long thread on this by me somewhere in Drivetrain with all the nauseating details
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