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Discussion Starter · #1 ·
Wonder if any of you guys can help?
My 2.0 16v pulls like a train all the way up to 4500rpm then falls flat on its face. I can get it to just over 5000 but it doesn't like it and then it won't go any further.
I have just replaced the plugs as the old ones were completely shot. Before I changed them the car ran rough and pick up was very poor also it didn't pull high rpm as above. Changing the plugs transformed the cars low down power and mid range but it still won't go above 4500.
Anyone got any suggestions?
ps I'm not getting any problems with the injector light coming on.

Colin :confused:
 
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Discussion Starter · #2 ·
Well it's certainly a fueling or ignition problem.

You could try new ignition leads as they may be failing under load (and if they're in the same sort of condition your plugs were) otherwise it may be worth getting your fuel pump and injectors looked at.

Ralf S.
 
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Discussion Starter · #3 ·
I have put some injector cleaner in the tank, I should maybe change the fuel filter too. I'll take a look at the plug leads this evening.

Colin
 

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Hi Colin,

Has anybody been at the timing belt? If one of the cams is off this could cause that effect.

Cheers

Hugh.
 
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Discussion Starter · #5 ·
Yes the head was rebuilt with new valves etc before I got the car. Unfortunatly I cannot contact the previous owner to see if the problem has been there since this was done. Mind you the car has done 12k miles since the rebuild.
Does anyone know the proceedure for checking the cam timing?

Colin. :confused:
 

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You need the cam locking caps mentioned in other posts re. timing belt changes. They're about £90 I believe so probably cheaper going to a specialist garage to get it checked I think. Better check out all the other possible causes first, just in case.
 

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You mau have done this already but the air filter/intake may be partially blocked. I had a similar problem last Autumn and it turned out to be a leaf stuck in the air intake.

Phil
 
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Discussion Starter · #8 ·
a silly point but...

have you checked you cat/exhaust system out???

a mate accidentally bottomed his cavalier... this smacked the cat... that cat broke up inside (looked ok from outside)... this threw ceramics into his back box (or can possibly have been a silencer)... and blocked up most of the box... this severely reduced airflow... and the car would not go above 4,500 rpm. couldn'e get enough air through.

1 new backbox and cat later... vroom vroom no problems and goes like a rocket... well as much as a cavalier can :D

might be an idea to check that none of yer silencers are blocked/partially blocked

this is a bit of an extreme case but it does show that it can cause funny probs.

just an idea.......

rgrds

j
 
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Discussion Starter · #9 ·
So far I have got as far as checking the inlet side and the plug leads and coils. There does not appear to be any problem with any of this. I have ordered a new fuel filter so that is next. The car has done 137k and the exhaust looks pretty old so I'll check it out next if the fuel filter does not improve things.

Colin.
 
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Discussion Starter · #10 ·
Just for advise, i changed my filter a couple of weeks ago bit of a get to udo the old nuts, anyway i would suggest to replace the copper washers that go with it. I used the old ones but in getting them off one got slightly scored on the surface when the system presurised itself it leaked from this tiny scratch. for the price of them it would have saved a lot of time etc

Cheers
 
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