Seeing fuel and oil around fuel pressure regulator

[bucket]

Should I put something to fill this in completely

From what I remember, that blob of weld is there simply to lock down the pressure adjustment.

 

[Hugomartin]

I noticed a chip off the cast iron diaprham top. Quiet possibly was leaking fuel if that fails I’ll put gaco roof black silicone on it

 

[Hugomartin]

Well I put the new diaphragm in got it runnin but when I put it in gear it dies . Mind you new fuel pump and fuel filter , no carbon in the intake.... since it’s colder weather should I turn the idle screw to the right run more leaner on fuel ?

 

[Hugomartin]

As soon as the weather cooled down I noticed loss in power in gear and at idle....I can only fathom adjusting either the iac idle screw?

 

[Hugomartin]

Ok no bogging down in gear when I disconnect the iac plug, does some light popping backfire sounds occasionally with the iac plug disconnected when in park . So I have to just light touch the gas to smooth it out very interesting. I wonder if I’m alright with driving around with the iac unplugged in the winter time?

What problems can arise driving with iac unplugged?

I feel more confident that my truck won’t stall out when I’m at a green light turning with my iac unplugged.

Winter time iac unplugged
Summer time iac plugged in

Any thoughts?

 

[Hugomartin]

Well tried to drive this cool weather morning with iac plugged in and unplugged still the same rough running stalls out in gear got a code 33 and 42

 

[Hugomartin]

I’ll probably get a new o2 sensor , I don’t feel like I have any vacuum leaks don’t know why I’m gettin code 33

 

[Hugomartin]

I saw a video where shorted injectors can cause excessive amperage and rough running I’ll try to find out how to test my injectors not sure how yet

 

[Bextreme04]

I would suggest you go into the resource library and get the manual for your truck. There are specific troubleshooting procedures for identifying the root of the problem. Did you rebuild the injectors while you were doing the FPR? Judging by the state of the diaphragm and the gaskets, I would bet the injectors need a rebuild too. Have you gone through the ignition timing set procedure and the idle set procedure? You should NOT adjust the idle stop screw unless it is during that procedure. When was the last time you changed plugs, cap, and rotor? Its also probably a good idea to get an ALDL reader so you can see what the computer is seeing from the sensors. It will make the troubleshooting infinitely easier.

 

[Hugomartin]

I would suggest you go into the resource library and get the manual for your truck. There are specific troubleshooting procedures for identifying the root of the problem. Did you rebuild the injectors while you were doing the FPR? Judging by the state of the diaphragm and the gaskets, I would bet the injectors need a rebuild too. Have you gone through the ignition timing set procedure and the idle set procedure? You should NOT adjust the idle stop screw unless it is during that procedure. When was the last time you changed plugs, cap, and rotor? Its also probably a good idea to get an ALDL reader so you can see what the computer is seeing from the sensors. It will make the troubleshooting infinitely easier.

Already changed plugs cap n rotor I have not rebuilt the injectors do you have a link to the library? Next step I’m guessing is use an amp clamp on each injector wire and see how many amps I’m pulling. I don’t know the correct amp draw however yet


Truck ran fine well 93 percent fine this summer when I replaced most of the parts

Thanks

 

[Hugomartin]

I’m getting about .2 to .3 amps on each wire going to the fuel injectors (4wires) so just shy of a half amp going to one injector not sure if that’s good , it’s spraying good but kinda over spraying a tad bit meaning some splash out

 

[Hugomartin]

I bought a new oxygen sensor didn’t change nothin but stimulate the economy

 

[SquareRoot]

cHIT cAN IT. LS Swap. OR move to a warmer climate.

 

[Bextreme04]

do you have a link to the library?

Its the forum right above the one you are currently posting in... first one in the list. Here's a link though: https://www.gmsquarebody.com/threads/1973-1991-service-manuals.14499/

Just go down to 1987 and then click on the one for "fuel and emissions including drivability". That is the manual that will give you a flow chart for troubleshooting the whole TBI system.

 

[Hugomartin]

could it be my power steering belt not being tight enough too much slack on the cam pully?