Ωhm

Fasten Belt Indicator Control in the 88 wiring diagram show this wired to the chime module. Can't find or figure out how the Fasten Belt Indicator Control works without the chime module.

Aren't you missing the upper bushing in that photo?

Was it the Pink wire? 88 wiring diagram. Fuse feeds both hazard flasher and brake switch.

Don't know about the re-assembly without the plenum, but won't you miss the defrost mode (dew on inside windshield)?

Both. Does fuse blow when new fuse is installed (key off) or when new fuse is installed and you step on the brake pedal? You might need lots of fuses to solve this.

Your starving on air or your starving on fuel.

Hey gogmorgo, if you flip that rubber pad (worn out corner) on your brake pedal, you'll can get another 300k miles out of it.

If you got the time, cruiser has the tip. Drill out the mounting holes and move CPS closer to trigger wheel. Cruiser Tip #7

Corrected

Chart is sorted by Ballast Resistor Current (Amps). Chart shows two (2) of the three (3) measurements taken by vehicle owners: Ballast Resistance (ohms) and Voltage Drop Across Ballast (volts). The other two are calculated. Ballast Resistor Current is Voltage Drop Across Ballast divided by Ballast Resistance. E/R=I Fuel Pump Running Resistance is (Battery Voltage minus Voltage Drop Across Ballast) divided by Ballast Resistor Current. E/I=R As stated earlier, I'm looking for a trend by using Fuel Pump Running Resistance to check fuel pump performance.

Yes, anything 4.0L.

1987 early builds had no ballast resistor. Ballast appeared later in the same model year. Pump noise complaint's.

Test

By-pass your fuel pump ballast resistor (if equipped), only to eliminate this as a possible cause.

Yeah, Veh 2, Item 2 looks a little low. lol. Thanks for your time and hope you find your keys.

ECU is senseless if EGR solenoid is present or not. No DTC's here. EGR is usually activated during warm cruise, not idle.

One small thing about EGR delete, when ECU determines EGR ON, INJ PW is shortened slightly due to the increased exhaust gas mixture entering the manifold.

Check hose between radiator and overflow bottle for blockage.

Disconnect and plug vacuum line to fuel pressure regulator. This will maintain maximum fuel pump pressure during crank.

Done

Time to add more request to the request. Ballast resistor resistance. Like mentioned above remove one wire and measure resistances. Re-read request (post #1). HOrnbrod you want 1.6Ωs?

I'm making a a$$umption here, I'm using 1.1ohms for the ballast resistor, unless I know of an exception (HOrnbrod again). Too keep this simple, voltage reading are fairly consistence between meters, ohmmeters are not. Ohmmeters rely on the condition of the internal battery. Maybe the results could ask a question: "What are the ohms at the ballast"? But yes, you're right about this.

Yes, I've been vague about the voltage measurements. Keep in mind I understand what I'm saying, that don't mean others do. Let's clear up the voltage measurements. One voltmeter needed. Battery voltage to be taken at the battery, using both battery posts (terminals may be dirty). If no post is available, connect VM to terminals. As for the ballast resistor voltage, connect one lead to one terminal of the ballast and the other lead to the other terminal of the ballast. Across the ballast. Polarity doesn't matter, what I need is the number. Voltage drop at the ballast and knowing ballast resistance, one can determine current flow thru the ballast. Since the ballast is in series with the fuel pump and current flow is the same in a series circuits, we now know fuel pump current. Using fuel pump current and battery voltage minus ballast voltage drop, one can conclude fuel pump running resistance. This resistance value is what I'm trying to tie into fuel pump health. Everyone punch holes into this. I know I'm leaving a bunch of open ended variables like different voltmeters, ambient temp, fuel density, fuel rail pressure (HOrnbrod), altitude, is it raining, etc, etc. As for engine at normal operating temperature, some will be and other won't. But I have one constant, engine running at idle. So any and all value will reflect this, engine running and at idle. Numbers that fall out of this yet undetermined window, could show as a problem.

2 measurements. Battery voltage and voltage across the ballast (when hooked-up). No one needs to crawl under their vehicle.

I've adjusted request/data form for multiple vehicles. Good point. Re-read request (post #1).