fuel I think Options

[driver66]

damn car, I was cruising and happy,then i developed a miss in my1.7. so I kept driveing and it jumped out of it ,then back and forth. so I get home and throw in a new set of plugs and cap. [local parts store has the rest ordered] and fire it back up and off i go to work , no fix...so i figure its my injector cutting in and out. at lunch i wiggled some wires to see if it could be a bad connection . after work i jump in to come home and she would not do anything but turn over ,the fuel pump would not come on . so we pulled it in with a damn ugly s-10 and set ever sence......3 days ...............help me please find this problem

[Dave_Darling]

The pump is run by the ECU, which sends a signal to the pump relay on the relay board. Try swapping the two middle relays on the relay board with the two headlight relays in the front trunk. Then try the headlights. This will test the relays.

The pump should run for about 1.5 seconds when the key goes from "off" to "on". When the trigger points down in the base of the distributor open and close fast enough (showing over ~200 RPM engine speed, I think) the ECU will tell the pump to run.

The pump will pressurize the high-pressure loop of the fuel system. It will not cause fuel to flow through the injectors--the ECU has to tell them to open in order for them to inject any fuel.

First step is to get the fuel pump working. Check the relays, and check the wiring harnesses that are plugged into the relay board. There's a fuel pump troubleshooting chart on Brad Anders' 914 page, http://members.rennlist.com/pbanders . Chances are at least decent that you'll fix your other problem when you've fixed whatever is keeping the pump from running.

Then start checking all the basics.

--DD