when i got my car serviced last week i was told by the guy who did it, someone who knows more about cars then anyone iv ever met, so i respect his opinion, he told me that my engine was struggling with the bosch super 4's id put in.

he told me that the problem i have at idle, i.e my revs drop when im stood still almost to stall and then pick up again, is due to the sparks, thinkin back the problem only started around the time i changed them, could he be right? he suggested it might be cos iv got the wrong ones, that i might have the ones for the v6 model because otherwise theyre shouldnt be a problem, but he did add that he has come across more than one occasion where engines were struggling with super 4's.

now i have to admit i think he could be right, fair enough he doesnt know our cars like we do but it makes sense an would explain my problem. i did make sure at the time i bought the right ones for my engine, 1.5 ba, has anyone else got this problem with the 1.5? anyone have it and using super 4's? or is this the first time hes been wrong about somethin? any other explanations of the drop in revs at idle, it comes very close to stall and the car shakes, not massively but you can feel it, but it never does stall an the revs pick up agin. is it just the engine being efficient at idle?

Why don't you try the car with different leads and see if you notice the difference?

i Have a 1.5 with super 4s, and i have never had any problems with them....

Although saying that i never noticed a huge improvement either!

I've got Super 4's, and they're, er, super :D

Sounds like your leads are onthe way out, try pulling each one of each plug one at a time, hold it in the recess with the engine running and check to see it the spark is arcing from the lead to the head, quite common for mechanics to overlook this, happened to me, also, what number plugs are you using, they should be 510's from memory, but your car should NOT struggle with them!!!!!

Run 2 Citroen Xsara VTR's with super fours, smoother tick over and better response no problems at all.

Andy, dont fancy the idea of holding each plug lead whilst the engine is running..... cant be doing with my hair style that spikey....

habs, I have to agree with your mechanic on this one; I used to have Super 4s and the engine felt SOOOO good after I changed them to Denso Iridiums!! I had already changed to 'racing' leads but this had a negligible effect in comparison!!

Flat spots disappeared and revs were freed up. The car was also no longer hesitant when under high gear acceleration on the motorway.

When I took the plugs out 2 of the Bosch's looked pretty bad....


Andy; If you're interested I still have a pair of Super 4s left over (it's a bugger having a V6 and having to buy 2 packets!! ) You're welcome to them if you haven't switch to iridiums already.......