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Discussion Starter · #1 ·
Hi All, I had my T5 in for an MOT yesterday - back in the summer I benefitted from a Pendle re-map which really transformed the van! When I drove home from the MOT though last night, the van felt sluggish and nowhere near as responsive as had been prior to the MOT. I'm no technical expert, but didn't feel like the turbo was kicking in as quick and I needed to floor the throttle to get anything like the performance before.

Has anyone experienced similar problems post MOT - I'm a bit worried that the emissions test has caused something to go wrong, but difficult to prove I guess? They did say that there were problems with the emissions test equipment and I got a sense that they were having to re-do a number of tests because of the faulty readings/calibration.

Would appreciate your views?

Thanks in anticipation,
David.
 

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Turbo doesn't work when there's no load, so on a mot the turbo does kinda spins but doesn't produce a a lot. They just rev it up a few times to get there readings but they do warn you that they are going to rev the t!ts of it.
 

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Hi All, I had my T5 in for an MOT yesterday - back in the summer I benefitted from a Pendle re-map which really transformed the van! When I drove home from the MOT though last night, the van felt sluggish and nowhere near as responsive as had been prior to the MOT. I'm no technical expert, but didn't feel like the turbo was kicking in as quick and I needed to floor the throttle to get anything like the performance before.

Has anyone experienced similar problems post MOT - I'm a bit worried that the emissions test has caused something to go wrong, but difficult to prove I guess? They did say that there were problems with the emissions test equipment and I got a sense that they were having to re-do a number of tests because of the faulty readings/calibration.

Would appreciate your views?

Thanks in anticipation,
David.
David,

Take it to any Pendle agent they will do a full live datalog.... It could be there is a boost pipe come off or a vacumm hose they pulled off..

Regards
Martin
 

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^WHS

Considering you've uprated your van I think we can safely say that you use the full performance envelope of the engine. A quick sweep up to high revs on an emmisions test should be no problem if the engines in good shape.
 

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Not to frighten you, but have you heard them with a diesel engine when they do the emissions.

That's what the rev limiter is there for sir.

Holy moly, they really do rev the T1ts off them.
 

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Discussion Starter · #6 ·
Thanks all. Martin, thanks for the kind offer. Will have a quick look in daylight on the weekend for anything obvious otherwise will get it checked at next opportunity with one of your agents. Cheers David
 

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In relation to Groovers description, they should only be giving it a quick acceleration rev as it is no longer correct procedure to rev up to and hold it on the rev limiter, this can cause damage if prolonged. If a pipe had come off, then you'd hear it and also see black smoke from the rear if the car. Just check the air mass meter is still connected, as they might have disconnected it to get it through emissions if it has been remapped. Just a theory
 

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In relation to Groovers description, they should only be giving it a quick acceleration rev as it is no longer correct procedure to rev up to and hold it on the rev limiter, this can cause damage if prolonged. If a pipe had come off, then you'd hear it and also see black smoke from the rear if the car. Just check the air mass meter is still connected, as they might have disconnected it to get it through emissions if it has been remapped. Just a theory
You do not have to do anything to get a vehicle tuned by Pendle through the UK annual MOT... Also if any sensor is disconnected you will get a engine management light on the dash, becuase they are electronically controlled / scanned..

I would check for any boost leaks, pipes come off etc etc, or better still take it to a Pendle agent and they will do a full live datalog and this data will be sent to me personally so I can check it and report back the problem..

Regards
Martin
 

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Martin, I wasn't having a pop at you or your company's professionalism. I know that an air mass meter or coolant temp sensor doesn't always bring a light on but can store codes. If, say, the airmass meter was defective though, this could alter the fuelling of the engine either with or without a remap and would alter the emissions. Am I correct?
 

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Martin, I wasn't having a pop at you or your company's professionalism. I know that an air mass meter or coolant temp sensor doesn't always bring a light on but can store codes. If, say, the airmass meter was defective though, this could alter the fuelling of the engine either with or without a remap and would alter the emissions. Am I correct?
You mentioned checking to see if the MAF was DISCONNECTED... this will 100% always throw an engine management light... and realistic an MAF sensor going faulty in a hrs MOT test is highly unlikely....

Forums are a great source of info but a lot of the time it can be very misleading and end in people spending way to much money chasing faults with fitting parts... i.e. Yes I had them problems and fit a MAF and it fixed it, or N75, or turbo, or Intercooler, or temp sensors etc etc etc etc etc....

Regards
Martin
PendlePerformance
 

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Martin, it's obvious that you know your stuff, but I have also worked on VWs in main dealers for over 20 years. I was making a comment from experiences that I have come across myself. I know forums do give out incorrect information and every case is different. I was offering a suggestion not a fix, to his problem I have a customer with a Rover ZR that has had the airmass meter disconnected for over two weeks and it only brings a fault code up but no light on the dash. It's an ongoing saga via the AA though. I can't know everything about everything, nobody can.
 

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Martin, it's obvious that you know your stuff, but I have also worked on VWs in main dealers for over 20 years. I was making a comment from experiences that I have come across myself. I know forums do give out incorrect information and every case is different. I was offering a suggestion not a fix, to his problem I have a customer with a Rover ZR that has had the airmass meter disconnected for over two weeks and it only brings a fault code up but no light on the dash. It's an ongoing saga via the AA though. I can't know everything about everything, nobody can.
This is going way down the wrong road, I simply corrected you in stating the MAF would throw an engine management light on the dash, now in your 20years working for a main dealer VW garage you will know this already..

Again forums and peoples threads can be really misleading to people reading it, so its wise to be 100% sure of what you are talking about when giving advise or it can cost people lots of money which is unfair..

Check wiring problem on Rover...

Regards
Martin
 
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