4agze fuel injector feed question

[Hen]

I know you've said that fuel flow and pressure is fine. But I've heard of a similar situation where the pulsation damper (the big mushroom thing on the inlet to the fuel rail) had died and was causing the problems. On my engine I removed this and just whacked a 90degree fitting in there (required an adapter from Pirtek).

Before you do anything too expensive, find the diagnostics wire out of the ECU and reset/check for error codes.

[draz]

Thanks Hen, thats worth a look. Ill go and check with the mech on Monday. I thought that mushroom thing was the fuel reg? or am i looking at the wrong part? Hopefully I have the map by then too.

[Hen]

Sorry I could have beem clearer... from factory, there is a mushroom thing on each end of the 4AGZE fuel rail. One is the fuel pressure reg (has a vacuum signal going to it and sits on the cyl 1 end of the rail) and the other (no vacuum line and sits on the cyl 4 end of the rail) is the pulsation damper.

Pulsation damper can be removed. Though it's not something that fails regularly.

[draz]

Good news....Hen, you were right...it was the pulsation damper and there was rust in the fuel rail. Now the car runs real smooth right thru the rev range. I havent seen it as yet but I pick it up tomorrow to drive it home so Ill give it a bit of a test then :-)
Thanks to all who have offered suggestions to this problem. Just goes to show there are a multitude of little things that can go wrong.
Cheers all
David