Car Struggling Under Higher Boost And Revs

[patto1234]

Been having problems with what I believe to be something to do with coilpacks. When I am in first and I plant my foot the car will quite often get to a point where it will just "stall" and the revs won't want to keep going. Like it gets stuck at a certain rev range and I gotta change gear. I have had problems with coilpacks before and its not misfiring really badly, but it does feel kind of similar. The car feels kind of jumpy and not to happy. A mate of mine pointed out that my unstable idle could be a sign of coils? I just cleaned out my AFM so it should be pretty clean. It also tends to happen mostly when the engine is hot after I have been driving it for a bit

I am just curious to see if there is anything else it could be?

Edited September 26, 2006 by patto1234

[phee]

Sounds like it. Could also be the fuel pump struggling to keep up?

[kwazza11]

Sounds like your plugs are fouling, either pull them out and have a look or hit the freeway and hold it at 100 in 3rd for a while and see if it clears up the miss.

[Rolls]

Does it pop and misfire when you get to this point?

A good way to check the coilpacks is to take the cam valley cover off. Take it for a good spin at night, get it nice and hot and put it in a dark shed and keep it running. Give it a few good revs and see if you can see any blue sparking from the coilpacks to the head.

Try gapping the plugs down to .8 and then .6, if this fixes it then its a spark related problem and most likely your coils.

If the plugs are old though it could just be them.

[patto1234]

It doesn't really pop or misfire so much, rather it just gets bogged down in a particular rev range and sounds like it is struggling. They are the original coils so there is a good chance thats the problem.

It shouldn't be my fuel pump as I have an aftermarket Walbro item which I don't think is that old. I figured it must be something to do with the coils, the gapping of plugs or perished sparkplugs or something like that. But I just wanna get a better idea of what Im looking at having to fix

[Taso84]

Walbro pumps are know to last only for about a month, I reckon check the fuel pump 1st