Hi, the car in question in a escort gti on a r plate. 91 k with full history.

Only had it a week or so and it seemed to be hesitant at motorway speeds. It has what looks like K&N induction kit and a cat back exhaust.

Anyway, I set about to find the cause..

Removed plugs and seemed fine, removed leads and found a broken one at the ignition coil end. Replaced plugs and leads with new set. Also put standard airbox back on to reduce the noise.

Went for a drive and it was a bag of sh**e.

It idles ok, About 1k cold and im guessing 800 / 900 warm..
but it just would not let you rev it.

So again, set about taking a look.. I checked the AFM. This is what confuses me as people say the car will go well, if not better with it unplugged. Well, with the engine idleing i unplugged it and it cut out. I could not get the engine to run with it unplugged.
Is that right? I cleaned it anyway and refitted it.

I also took took off the tps. The car would start, if you tried to blip the throttle it would cut out. So i put that back on.

I also found a few connectors caked in copper slip.. One to the ignition pack / coil, the air inlet temp and the water temp sensor so I cleaned them off.

I also replaced the induction kit back on and looked at the lambda connection. The pins were white and looked like a bad connection so I put a bit of grease on them.

Took it for a drive and its much better. But its drinking the fuel like no ones business.. Any ideas? Im still wondering why it wouldnt run with the AFM unplugged ?

It also feels a bit slow, for 115 bhp (if it still has that) but bearing in mind my last cars have been a s2 rs turbo, subaru imprezza etc, I also have a gsx-r 1000 k7 so I might just be expecting too much. I do expect better fuel economy tho.

 

They are not that good on the fuel.
Did you clean the MAF with carb cleaner ?, did you reset the KAM by pulling fuse for a few minutes ?
Check co, to ensure lambda ok, and put a new fuel filter on.
A problem with K&N's is the oil they and others of that type use is the oil contaminates the hot wires of the maf, so need cleaning regular.
tabetha