Rough Idle, can't hold rpms

[e30sh]

Fuel pressure is a little low. Could be cheap gauge / weak pump / semi clogged fuel filter.

Have you checked the the blue top temp sensor...it sends a temperature signal to the DME to adjust mixture based on coolant temp.

Have you done a compression test to confirm the engine is mechanically sound?

How do the plugs look?

[squidmaster]

The idle sounds almost like timing is off
but the rest of the issues sound like bad AFM.
try disconnecting the AFM and see if anything changes.

[Sladek]

I tried taking it around the block. got out of the garage and it fell on its face. had extreme hesitation and eventually just stalled not 50 ft from the garage. the spec for fuel pressure is 43psi and idling I'm low. anybody? bueller?

[Sladek]

so I changed back to the original injectors and that helped a little bit over the mustang injectors. i still have a lumpy idle.

I hooked up a fuel pressure gauge and took a video. anyone have any thoughts?

https://vimeo.com/184134578

[Sladek]

Rough Idle, can't hold rpms

no luck with the ICV replaced. still the same thing as it seems like it runs out of gas if I try and rev it up and hold the rpms. haven't had a chance to check fuel pressure yet

and it still sounds lopey and starts to try and stall

[Sladek]

Yeah, I was just thinking that the car thought you were at WOT for some reason any time off of idle, and enriched the heck out the mixture without air flow to compensate. Granted, this shouldn't happen when the AFM disagrees.

What's the exhaust smell like when running?

it smells pretty rich of something but it also has no cat thanks to the PO. I'm assuming it's got to be something under the hood since that's all I've messed with since I started it last and it ran like a champ

[roguetoaster]

would it still be this if its at every temp and cant hold WOT? haha trying to minimize parts throwing

Yeah, I was just thinking that the car thought you were at WOT for some reason any time off of idle, and enriched the heck out the mixture without air flow to compensate. Granted, this shouldn't happen when the AFM disagrees.

What's the exhaust smell like when running?

[Sladek]

all the fuel leaks that I know of are fixed and no leaks. I've only got about 1/4 of a tank in it

[squidmaster]

Are you losing any fuel when not driving the car? Gas evaporates pretty quickly, so if you did have a hole in your tank, you'd definitely be noticing fuel going missing.

[Sladek]

could it maybe be water in the gas tank? we did have a pretty large change in temperature this weekend

[squidmaster]

At this point you're just looking to trouble shoot. It could be: CPS, AFM, ground connection, or the coil. The o2 probably wouldn't hurt it that much, but you can always test that by just unplugging the o2 and seeing if any difference is made. The stock software should run stock injectors on a stock car pretty well without any o2 feedback. Well enough to see if that was your problem at least.

[Sladek]

If it runs fine at or near WOT try a different TPS and an O2 sensor if the stall occurs only when up to temp.

would it still be this if its at every temp and cant hold WOT? haha trying to minimize parts throwing

[roguetoaster]

If it runs fine at or near WOT try a different TPS and an O2 sensor if the stall occurs only when up to temp.

[Sladek]

haven't moved it out of the garage, been working on various things on it for a few months. I would guess it wouldn't since I can't make it hold a constant rpm on throttle before it starts choking

[squidmaster]

does it drive otherwise?