csgoat

Other than the fuel pressure regulator, what could be causing a fuel pressure issue? Again, I am going to pick up a test kit and check it out tomorrow. The fuel filter is good. Just replaced it a couple of months ago, the old one was completely disintegrated inside and probably hadn't been changed in years. I just got the truck about a year ago and have been going through the motions of getting it where it needs to be. Is there any way to test the fuel pump? I have been looking online and the only thing I have found is to hook a gauge to the fuel rail. But can I test the pump itself with a multimeter in order to isolate/diagnose?

Watched wrong TPS video, have since corrected. Compression isn't the issue. And fuel pressure is usually good, but I am going to have to test that and hope she drops off during idle so that I can see if my fuel pump is hunting.

My issue started after my truck had been sitting for about five days. I came home, hopped in and attempted to go for a ride. Truck would start, run for 3-5 seconds, then die. Hopped on here and it turned out to be a Fuel Pump Ballast Resistor. Fixed that, then the real issues began. Following is a list of issues and things I have done in an attempt to fix. Keep in mind, I tested/inspected everything before I replaced it, and yes, I did set the TPS accordingly. Upon start up, when put in gear (mainly reverse), or if allowed to idle in park after starting, truck would die, usually within a minute or two. When going from a stand still, I would get intermittent misfires. When giving gas, and then backing off the throttle, then giving more gas, truck would misfire/backfire When misfiring, if I pump the accelerator to the floor, it is almost as if a cylinder kicks in and the truck will take off, usually takes 3-4 aggressive pumps for engine to run proper Extremely rough idle (corrected) With each of these attempted fixes, the issue has gotten better, but still isn't running right. It definitely looks as if this truck has been neglected, I have only owned it for a little over a year. Cat dumped, muffler replaced, custom exhaust pipe Idle air control replaced Throttle position sensor replaced Fuel pressure regulator replaced O2 Sensor replaced Spark plugs changed to NGK (yes, properly gapped) Distributor cap and rotor replaced ignition coil replaced (wasn't bad, but a buddy of mine thought this was causing the issue that was solved by my ballast resistor) Ignition control module replaced (about six or seven months back when I was having a no start condition) Crankshaft position sensor replaced (again, about six or seven months back) MAP sensor tested good Coolant temp sensor tested good all plug wires tested good Fuel injectors tested good C101 and majority of other electrical connections cleaned New battery cables and cleaned grounding straps New Fuel Filter I am thinking my fuel pump might be fussing about. Is there any way to test this? Does anyone have any input on what to do next?

That was the culprit. Time to find a new one. Thanks for the input.

Cool. Thanks for the tips. I just got back in to town, so I will give this a shot tomorrow afternoon and see if we are fixed up.

Okay, Looked for this in the forum, but Doesn't seem as if I have the same issue as some of the other guys, it seems as if theirs wouldn't start at all. I turn the Key to "on", get all electronics working, then when I crank my truck, it starts up just fine, but dies after about 3-5 seconds. A buddy of mine told me it might be the ignition coil, changed that out, still does it. Recently I have put on new battery cables, Cleaned the C101, replaced the crankshaft position sensor, replaced the ignition module, and changed out the fuel filter. I don't think it is fuel related because it still starts. Any help would be greatly appreciated. Thanks 1988 Pioneer 4.0 RWD.

Thanks for the tips, I ended up just taking off the intake manifold and thankfully the valve was closed and the o-ring was sitting right there

I was getting an intermittent start condition on my 1988 MJ. I had checked most of the wiring, and all of that looks good. I was going through checking my fuel injectors to make sure none of them are clogged when one of the yellow O-Rings decided to jump in to the fuel injector port. Do I need to Remove the Cylinder head to get this out or is there an easier way?