Engine light on after cam belt/FIP belt change. - MG-Rover.org Forums
 
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post #1 of 18 (permalink) Old 08-11-2012, 22:01 Thread Starter
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Engine light on after cam belt/FIP belt change.

Right... Need some help here folks!

I'll start from the beginning.

Was going to do my belts so thought a good start would be to get my local garage to crack the crank pulley bolt then tighten it back up so it would save the headache when I came to undo it.

first fail...... On the 2 min drive home the pulley became too loose resulting in no power steering and then the brake pedal becoming hard and thus no brakes... Why would the brakes go?

Anyway... got the car up in the air and cracked on with everything. Aside from the limited space the procedure went as planned. I had to take a trip to the local scrappy to get a new crank pulley as the hole on mine became elliptical.

With the fuel pump belt I didnt have a torque wrench to do the tensioner so just did it by guestimate and made sure that the belt on the opposite side to the tensioner could turn 45 degrees.

So... all good and well I put the covers back on, filter back on, wheel etc and lowered the car. I left the MAF unplugged because Ive had some hesitation problems around 2k rpm mark. Car took a few cranks to start but when it did it all seemed fine.

Now the problem is... the Engine management Light is on. Ive tried 50 cycles of ignition but it doesnt switch off. Car seems to start and drive fine. (small run around car park) light has gone off for a second then comes back on after firing up. Exhaust note/engine tone does seem to change a little after a while?>>

No idea whats up tbh..
Any help or suggestions?
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post #2 of 18 (permalink) Old 09-11-2012, 10:09
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You lost your brakes and power steering because the aux belt drives both of these from the bottom crank pulley.
Your light is on because you have disconnected your maf this needs to be reset ....ignition cycling will not clear this.

Last edited by minesarover; 09-11-2012 at 10:22.
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post #3 of 18 (permalink) Old 09-11-2012, 10:13
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What year is the car?

Engine note might be the EGR, but it's controlled by the MAF so if it's disconnected I'd discount that...
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post #4 of 18 (permalink) Old 09-11-2012, 10:55 Thread Starter
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I guess I'm just super paranoid that I've done something wrong like FIP belt too tight or somehow moved the timing.
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post #5 of 18 (permalink) Old 09-11-2012, 11:01 Thread Starter
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Originally Posted by Chrisund123 View Post
What year is the car?

Engine note might be the EGR, but it's controlled by the MAF so if it's disconnected I'd discount that...
It's a 53 plate.
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post #6 of 18 (permalink) Old 09-11-2012, 11:10
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Well that makes life even more interesting, as if it's pre 2004 then unplugging the MAF shouldn't put on the EML.

I'm guessing either your pump timing is out a bit (interesting that it's starting OK though...) or you've managed to wiggle a connector loose while doing the cambelt or something.
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post #7 of 18 (permalink) Old 09-11-2012, 12:10 Thread Starter
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Originally Posted by Chrisund123 View Post
Well that makes life even more interesting, as if it's pre 2004 then unplugging the MAF shouldn't put on the EML.

I'm guessing either your pump timing is out a bit (interesting that it's starting OK though...) or you've managed to wiggle a connector loose while doing the cambelt or something.
It's a late 53 plate and has the mkII fob.
how would I put the fuel pump timing out if it's locked?
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post #8 of 18 (permalink) Old 09-11-2012, 12:27
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If you've the oval fob then having the maf unplugged will cause the management light to be illuminated, the same for egr being blanked - on the next computed drive cycle.

It's normal.



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Last edited by Dakta; 09-11-2012 at 12:33.
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post #9 of 18 (permalink) Old 09-11-2012, 13:47 Thread Starter
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Not sure what you mean by "next computed drive cycle"
Guess I'll have to have the MIL turned off by a garage.
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post #10 of 18 (permalink) Old 09-11-2012, 16:37
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You will need to plug the maf back in or it will just come on again.
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post #11 of 18 (permalink) Old 09-11-2012, 16:52 Thread Starter
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I have plugged it back in and it goes off for a moment when the engine starts but comes straight back on.
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post #12 of 18 (permalink) Old 09-11-2012, 17:02
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Quote:
Originally Posted by Leigh_ZR160 View Post
I have plugged it back in and it goes off for a moment when the engine starts but comes straight back on.

Thats because the fault is now stored and needs wiping.
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post #13 of 18 (permalink) Old 09-11-2012, 17:04
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It is often said that after a while with the maf plugged in it will go away, i am not sure how true that is, but plugging the sensor in is not going to make the light go away immediately i'm afraid. There are different status's for faults and even if the management light goes off, a 'note' will be kept.

Quote:
Not sure what you mean by "next computed drive cycle"
The engine management is 'smart' and some tests will only occur at certain times, for example the egr test might only take place within a certain part of what we call a 'drive cycle' so, just throwing an example out there, the egr test might occur when the engine is say, warming up. Or at a certain road speed. The egr test is one of the things that is causing your management light to come on because the maf sensor is what is used to control the egr system.



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post #14 of 18 (permalink) Old 09-11-2012, 17:26 Thread Starter
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Ok. Cheers guys. Hope it is just the fact I had the MAF disconnected.

Will take it to my local garage and find out what's flagged it up.
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post #15 of 18 (permalink) Old 10-11-2012, 13:49 Thread Starter
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Car struggled to start a bit today so I have a feeling I may have done something wrong with the FIP timing. How do you check the timing?
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post #16 of 18 (permalink) Old 10-11-2012, 14:21
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Lock the flywheel, then insert the pin in the fip. If it goes in nicely, timing is good. If it doesn't, timing is out.
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post #17 of 18 (permalink) Old 10-11-2012, 21:16 Thread Starter
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Quote:
Originally Posted by Chrisund123 View Post
Lock the flywheel, then insert the pin in the fip. If it goes in nicely, timing is good. If it doesn't, timing is out.
Kind of had to to it in a little. How do you re time it then?
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post #18 of 18 (permalink) Old 07-12-2012, 22:12 Thread Starter
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EML went out about a week after this thread. Poor cold starting persisted though so I've just removed and refitted the FIP belt again. Followed the instructions to the word and all is now good.
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