Search found 4614 matches

by rridge
Mon Sep 17, 2018 4:05 pm
Forum: Tech Questions and Advice
Topic: No Run Condition
Replies: 4
Views: 87

Re: No Run Condition

If the engine runs, even for a few seconds then the fuel pump is working. It may not be delivering adequate pressure but it is working. But as noted, the engine can run on the cold start circuit alone for a few seconds without having the ECU fire the main injectors. Anyone who's tried to start the e...
by rridge
Fri Sep 14, 2018 11:27 am
Forum: Tech Questions and Advice
Topic: Rough Idle, low power, and engine dies at stoplights
Replies: 74
Views: 1878

Re: Rough Idle, low power, and engine dies at stoplights

The Marelli electronic distributor is actually a mechanical/electronic hybrid. The distributor advances timing with engine speed mechanically. The mounting plate for the pickup moves to change that advance. So the wires on the pickup in the electronic flex every time the distributor advance plate mo...
by rridge
Wed Sep 12, 2018 11:00 am
Forum: Tech Questions and Advice
Topic: Rough Idle, low power, and engine dies at stoplights
Replies: 74
Views: 1878

Re: Rough Idle, low power, and engine dies at stoplights

For an engine that hasn't run in years those plugs look good. Catching the sensor wiring and the inverted coolant T will make a big difference. You are getting close.
by rridge
Wed Sep 05, 2018 10:04 pm
Forum: F/I/A/T B/S
Topic: 220 volt AC fan help
Replies: 8
Views: 192

Re: 220 volt AC fan help

The capacitor that is most likely to work it the one that the HVAC guy carries in his truck. This is a very common repair.
by rridge
Wed Sep 05, 2018 10:01 pm
Forum: Tech Questions and Advice
Topic: Coolant Temp Sensor causing car to die out
Replies: 43
Views: 655

Re: Coolant Temp Sensor causing car to die out

I second Bradley on testing the sensor input at the ECU end of the harness as the next move. Could be an intermittent connection anywhere in the wiring harness but most likely within a few inches of the connector itself.
by rridge
Wed Sep 05, 2018 10:03 am
Forum: Tech Questions and Advice
Topic: Coolant Temp Sensor causing car to die out
Replies: 43
Views: 655

Re: Coolant Temp Sensor causing car to die out

Assuming the afm and ecu are good the only parts that throws the car into “full rich” are the cold start system and the coolant sensor. Other source of "full rich" or the fuel side are the TPS with the full throttle switch stuck, a leaking injector, a sticking pressure regulator. Sooty plugs and an...
by rridge
Sun Sep 02, 2018 5:13 pm
Forum: Tech Questions and Advice
Topic: Power to Fuse Box
Replies: 6
Views: 149

Re: Power to Fuse Box

I have looked at C17 a bunch and wanted to separate it but couldn't figure out how. Can it be separated? The C17 connector is simply a hub with four male ports, two at each end. Each port accepts a matching white female connector. Every connector plugged into it is connected to the common circuit. ...
by rridge
Sat Sep 01, 2018 5:43 pm
Forum: Tech Questions and Advice
Topic: Power to Fuse Box
Replies: 6
Views: 149

Re: Power to Fuse Box

The power you are concerned about for the FI comes from connector C17, a very large white nylon thing with four wires. Two large brown, and two smaller wires, black and brown/white. The brown/wire proves power to the FI in-line fuse. One of the large brown wires brings power from the battery. At lea...
by rridge
Fri Aug 31, 2018 8:10 pm
Forum: Tech Questions and Advice
Topic: Ground Wire Locations
Replies: 13
Views: 319

Re: Ground Wire Locations

I would put both the ECU and FI temp sensor ground wires back on the plenum for two reasons. First, there can be small differences in the resistance between the battery and various locations throughout the car. The ECU will not see the correct value of the resistance signal from the temp sensor if t...
by rridge
Fri Aug 31, 2018 6:49 pm
Forum: Tech Questions and Advice
Topic: Ground Wire Locations
Replies: 13
Views: 319

Re: FI System Ground Wire Locations

There are five ground wire connections that serve the FI system. The electrical diagnostic manual calls them out this way: -G3 Lambda Sensor Mileage Counter - connected to the instrument panel ground pod above the ignition switch -G4 Main Chassis ground next to battery -G5 Fuel Pump ground - in the ...