Lumpy Idle

[sparky]

Hi,

I have a 1991 Nova GSI and it wont idle properly until its warm, and then it idles at 1200rpm, pretty standard set up as far as I know except it has a pipercross air filter.

Getting a bit annoying TBH, any of you guys have any ideas?


Thanks



Sparky

[craig green]

Air leak between AFM & throttle body? or in the inlet somewhere.

You can try cleaning the ICV if it helps.

[sparky]

I'll have a check for those at the weekend.


Cheers.

I assume the aftermarket air filter couldnt cause this?

[tashley6]

the air filter in my opinion shouldt really affect that much i have a simler problem on a 2.0 8valve and it is the airflow meter!! well a connection to it

[craig green]

It could be the air filter, they take in more hot air from the engine bay than the std plastic airbox, does making the engine run a little lean.

Is it a C16SE or E16Se engine??

[Damo]

It could be the air filter, they take in more hot air from the engine bay than the std plastic airbox, does making the engine run a little lean.

Is it a C16SE or E16Se engine??

It'll probs be an e16se on a '91 reg but im with craig on this one i think it could be an air leak in the inlet side of things.

Damo.

[sparky]

It drops down to stalling, when I turn on the lights and heater etc.....

[16v Nova Kev]

could need a new battery

[sparky]

Battery is new, never have any sort of probs starting it.The engine has a small oil leak, thinking of taking it out, giving the engine bay a spray and re-gasketing and painting the engine and putting it back in.

How long would it take to get the engine out? A day? Are the driveshafts hard to disconnect?

[sparky]

Thinking gaskets arent too expensive??

[craig green]

Use gaskets from a motor factor or GM stuff, not ebay. But not expensive tbh.

Engine can be out in 2 hours if you know what you are doing, but stubborn bolts & head scratching takes up hours. Pretty sure you could search out a guide on here tbh.

But simply, with it jacked up, drain fluids, remove all off shoots of the engine like cables, wires, pipes & hoses etc. Then undo exhaust, undo the bottom arms & btie bars then support the engine on a jack, undo the lower strut/knuckle mount bolts , undo the engine mounts & the whole drops down to the floor.

Thats assuming you cant fix the running prob you have though.

[sparky]

I'll get my m8 to have a look at the weekend to try to sort the running problem, but it will still have an oil leak and the engine bay could do with a spray, although its not too bad. Was gonna take the engine out upwards, dont I want to do that?