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Showing results for tags 'fuel system problems'.
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HELP!!! I have a 87 wrangler, 2.5. When you test drive it, under acceleration, it gets slower and slower and starts to back fire thru the exhaust. After installing a fuel gauge to the TBI test port and running it inside to the dash, I can ride down the road, accelerate and watch the pressure drop from 15 lbs down to nothing. Based on these findings I replaced the fuel pump, filter, regulator diaphragm and adjusted. I still have the same problem. I ran a wire back to the orange fuel pump wire and tied it in there, connected it to a volt meter and drove the vehicle to see if it was loosing voltage to the fuel pump for any reason. It is not. It maintains 13 to 14 volts at the fuel pump but the fuel pressure will drop while watching both the gauge and meter. What else can stop fuel flow to the injector. I know the injector is part of and is controlled by the ecu system but this seems to be a lack of fuel pressure and seems as thou you would have to cut voltage to the fuel pump to cause my problem, but that is not happening per my testing. By the way, this jeep cranks fine cold or hot, will sit in the garage under acceleration and not miss a beat. Problem is only under a load while driving. HELP PLEASE