87 chevy r20 code 44 please help

[Irish_Alley]

This is a guess and if you have or can get ahold of a good ecm I would switch

[cditeodoro]

I understand 44 is a lean code I just don't know what's causing it.

[cditeodoro]

Can I only get a ecm at junkyard or can I get a reman from pep boys

[Irish_Alley]

Maybe a friend this way your not paying for something that's not bad. Idk if you could even find one at the junk yard

[cditeodoro]

My brothers got a 88 van g20. Maybe I can snatch his and see if it makes a difference. I think I'm going to rebuild tbi this weekend too and see if that helps. I'm just confused why it only does it after it's been running for 5 min and once it gets warmed up it runs a lot better. It's still not running 100% but it's a lot better

[cditeodoro]

Ok so I just found an exhaust leak right before o2 sensor where the bung got welded in. This is probably the reason for the code 44 but could it be the reason the truck runs like crap when it goes to closed loop?

[VileZambonie]

Unplug the hose from the EGR valve and see how it runs.

[cditeodoro]

Egr is new. I thought egr doesn't work on idle? I'll give it a try what the heck

[VileZambonie]

Exactly. If the EGR solenoid is stuck open the EGR valve will open with the engine idling and it will run like poop

[cditeodoro]

Unplugged egr and no difference. I bought a tbi rebuild kit with new fuel pressure regulator. What about the coil that's bolted to the manifold? Could that have anything to do with it? The one that's on the truck is the original.

[VileZambonie]

Did you check for vacuum leaks, spray around the base of the throttle body with some carb clean. See what happens

[cditeodoro]

I 'rebuilt tbi today and still have problems but I think the fitting coming out of intake for transmission and cruise is leaking. I sprayed it while truck was runing and I noticed a change and could hear it sucking the brakclean in. I will pull that out and Teflon tape it and see if I can seal it up

[Irish_Alley]

dont use brake clean. it burns funny and can produce toxic fumes

[cditeodoro]

Ok pulled the fitting out Teflon taped it and no more leak. But truck still runs like crap. It has to be something dumb I'm missing. I'm not getting and codes now and the truck seems to run "ok" when it's warmed up. When it's first started in open loop it's fine but as soon as it goes into closed loop it searches at idle and stalls and when I drive it has no power and I have to feather the gas just to take off or it will pop out of the throttle body. I'm at a loss and now I just hate to look at the truck.

[cditeodoro]

So I have been looking around for answers and someone told me that my oil pressure sending units can have an effect on the truck running bad. My gauge doesn't work. It's on 0 all the time. It used to work with old motor in truck but after I put new motor in it hasn't worked. I have 2 I think one is next to distributed and one is by oil filter. He told me one of them has a fuel pump relay in it and he had similar problems to what I'm having and he replaced both andit fixed it . Does anybody know if there's any truth to this or is he full of shoot?