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power loss 1.6xel

279 views 0 replies 1 participant last post by  stevejknight 
#1 · (Edited)
1.6XEL. no mods.

When I press the accelerator very slightly the revs drop by about 50-75 rpm momentarily then increase.
I notice this when the car is in 1st gear with no accelerator moving very slowly, then when I press accelerator to speed up the car jerks as it looses power then picks up speed.
It is as if the car is starved of fuel in some way when the accelerator is pressed.
This only happens when the accelerator moves from the default home position.
If accelerator is pressed down further when car is moving at constant speed the fault does not happen.

Other symptoms: - The car is running rich as the plugs are black.

I can also hear the injectors firing in the engine bay, I think the noise it loader than normal, but not sure.

Could fuel pressure be a problem?
Ran car without fuel pressure regulator connected to vacuum, and no difference in running performance.

Could it be fuel pump, this is a little noisey.

Items Changes out:- Coil Pack, Air idle valve, Leads, CTS, ERG, plugs, Lambda.

Any idea what can cause this sort of problem?
 
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