D16 Vtec + Megasquirt.

[iceminion]

Well, eventually, this thing is gonna get little evo'ed, but until then, this bitch has got some commuting to do.

[tehehodi]

is it misfiring? i know those ditributors can be whacky on these cars? i dont' remember though

[iceminion]

Replaced distributor, issue the same. I could have 2x bad distributors, but it is unlikely.

[cmspaz]

Do you think, that, even if the EGR was jammed all the way open, would it cause issues like this?

And vacuum leaks? this car is MAP, it reads the pressure in the manifold and adjusts fuel accordingly, vaccum leaks on this car = irrelevant.
I'll have to dig out the Chilton for it, I sold the truck years ago. I didn't do much work on it myself, so I'm not sure if it was MAP or MAF. It was the Isuzu 2.4l, if anyone knows.

Regardless, when the valve seized, it wouldn't even idle without being held at partial throttle.

[Kracka]

Check the intake manifold gasket and all lines/emissions attached to the intake manifold.

[tehehodi]

Replaced distributor, issue the same. I could have 2x bad distributors, but it is unlikely.

is it rotated the right direction? the plugs in the right order on the distributor? i know if you rotate it, it changes the timing or something.

[Shane@DBPerformance]

What year is the car and what CELs does it have?

[tehehodi]

try posting on d-series.org, they might help you to if we can't

[4seasons69]

Sounds like a vacuum problem to me.

My truck got the same symptoms when the EGR valve seized.

it's a map car if it had a vacuum leak it would idle high not low. and as for vacuum leaks being irrelavent they still are relavent they just cause different problems then they would on a maf car. a stuck open egr valve could cause this though

[cmspaz]

I believe the truck was MAP, I'm not seeing a MAF in any of the pics in the book.