Magnex problem

[flash80uk]

OK, i got my new Magnex exhaust fitted today but i have a few problems.

1. The exhaust is rattling around quite a bit and is hittng parts of the car underneath. The mechanic said that if i had any such problems he may have to remove a heat shield under the car. Is this right or is there any way to stop the exhaust from causing so much noise.

2. When the car has been parked for a while and i drive off the revs will not go above 2K no matter what gear i am in and no matter how hard i press the accelator. The revs start to drop but after a minute or so the revs pick up and the car runs fine ???

I was thinking maybe a build of gasses and then the blockage clears ??? Any suggestions..

 

[craigy172]

yes i had mine magnex bang on the heat sheild he just knocked a bit away from it did not remove it, as for number 2 i have no idea

 

[telford_mike]

1. Your Magnex should fit properly without removing the heat shield - the fitter might need to play about under the car, but it should fit perfectly - no rattle, nothing. Its an expensive thing - insist that its done right.

2. Have you tried resetting your ECU? Do a search to find out how to do it.


[Edited by telford_mike on 06 May 2004 at 8:26am]

 

[flash80uk]

done a quick search for resetting my ECU. Nothing came up, only references to re-mapping the ECU.. Anymopre suggestions ??

 

[flash80uk]

would it do any harm to remove the heat shield

 

[BenR]

NOt really no, but get it to hang correctly by bending the hangers, no biggie.

As for the running problem.....its NOT the exhaust.

 

[flash80uk]

the car was running fine untill the exhaust was changed. Thats the only thing that has changed recently

 

[BenR]

it really shouldnt and cant cause that problem.

Did you damage the lambda sensor in anyway?

 

[flash80uk]

?? the what...my local garage fitted the exhaust

 

[BenR]

the lambda sensor......thats the only thing they could of really broken whilst changing exhaust.

 

[Jonathan]

There are two revisions of MK1 172 exhasuts, up to ~Jan2001 it had one exhaust sensor after that it had two ( to do with emission regs). I remember this caused problems at the time with Magnex exhausts but that was basically the original magnex only had a mount for one sensor.

Would have thought you would have some lights on the dash during the rev limit ?

 

[flash80uk]

no lights at all. the revs just will not go above 2k, then start to drop, as if the car is about to stall. a short while later (10 - 20 secs) the drive returns to normal. goig to take it back in tomorrow and get the rattles fixed and ask him about the other prob.