Away8777

Well boys I figured it out turns out I had a huge vacuum leak. Something so stupid and I overlooked completely thinking I had more serious issues...... The vacuum reference for the break booster was disconnected because there is no booster in it!!!!! I feel like an idiot but glad I figured it out the truck now stays running under 1000rpms but sputters and chatters at idle now. I'm going to do everything every one has said on here moving the MAF further away resetting the ECU and messing with the IAC a little bit will keep everyone updated on my findings.

Thank you Matt this is obviously part of the IAC system by what I can find is it's for cold start ups and cold weather if I get this weekend I'm going to start tearing into it the more research I do and the more Info I get from you guys I'm starting to lean more towards a vacuum leak or an issue with my FPR. I know that without proper vacuum on the FPR the engine will not stay running thanks again I will keep everyone updated

It seems like some sort of air diaphragm I outlined it here and the red line is the line that is connected to the hard line that is also connected to iac

I believe it's an air line as it tees off the hardline under the intake manifold that the IAC is connected too and it is a factory ECU from a 1990 240 sx

Does anyone know what this is in the image ? It's between the intake manifold and the injectors it's plumbed into the same line as the IAC?https://imgur.com/a/82h576l

I'm not getting any codes I did get a MAF code when trying to bypass the turbo by going straight to the throttle body with some intake piping I had laying around. But I reset the ECU by following the procedure with the dial on the ecu .at least I believe I did it right. I would assume that the ECU resets when the battery is disconnected as well correct? And as for the injectors they look like the factory 240 sx injectors and I was told they were stock by the previous owner.

I can't get the truck started with the MAF unplugged. The previous owner stated that he was driving the truck every day then got the idea to turbo it and that's when it stopped running good I will check the IACV wiring in a bit. I have read all over forms about the PCV and valve cover vent causing vacuum leakes but then other people saying it won't cause any issues it seems there is no definitive answer. Right now the valve cover is to atmosphere and the PCV is ran to a port on the intake manifold after the throttle body not sure if this is right

Icehouse this also has one of your can/am boxes in it with some scary wiring not sure if that's the problem or not I went over it and looked also sent some pictures of it to ]2eDeYe to look over when we were talking about the motor mounts he makes and he said everything looks fine.

So I just ran a temporary test pipe for the intake with the MAF about 25in away from the turbo inlet the truck still does not want to idle or stay running any thoughts?https://imgur.com/a/UlEVBVA

10/4 thank you👍

So Mike are you saying I should have it by the throttle body after the BOV ? I figured that would give false readings due to the forced induction?

Ok I wasn't sure if the MAF was an issue as it wasn't throwing a code with it so close I will try relocating it tomorrow and get back to you guy I appreciate a response you guys are great.

I have adjusted the IAC it helps a little and as far as I know the ECU is stock the 02 sensor is hooked up the ECU is throwing no codes when the turbo is hooked up I tried bypassing the forced induction system by simply hooking the intake, IAC line, and mAf back up to the throttle body and it still would not idle and would throw a MAF code.

Hello everyone first thing I want to say is thank you to everyone on this site for helping me get my 82 720 pickup running good the community here is great. I recently picked up a 85 with a KA24ET swap. I was told that the truck was NA and ran great for the longest time. The previous owner decided to throw a turbo on it and now the truck won't stay running I have been chasing down vacuumed leaks left and right on this thing. When I do get the truck to idle it stays at about 2k rpm I have pictures and a short video of how everything is ran and would like some input on the set up it has stock fuel injectors factory 240 MAF and stock ECU I'm wondering if it is possible to at least get this to stay running for now without getting the bigger injectors and tune that is needed to drive it. https://imgur.com/a/PL3r0MI https://imgur.com/a/8ytWG5C https://imgur.com/a/fu1RtiF https://imgur.com/a/v1VeZtD https://imgur.com/a/PvXOMis https://imgur.com/a/X9J15Lp

Mike the tire size on my truck is in fact 205/65r15