The problem I have is a GROUND issue, NOT a power issue. Schedule Fuel Injector Replacement. Learn to test and analyze automotive fuel injector circuits from a wiring diagram perspective. However I do not understand one PCM allowing spray without cranking. Tip: Some DVOMs have alligator clips so that you don't have to hold the lead. Terminal Type: Wire Lead. We replaced the outer wiring harness for a 3rd time and the truck worked for 5 weeks. The other was a bad coil pack.
I disconnected … vintage yamaha dt parts Mar 25, 2005 · Sep 12, 2002. I"ll have the new relay tomorrow to check whether a faulty relay could unexplicably be the cause of the fuel injector problem. The wiring harness plays the vital role of providing protection to the wires, thus preventing them from exposure. Exposure of these wires interferes with the transmission of information through the car's computer, and this may cause certain automated functions to fail. My wife is very happy with this minivan (she found it used). I learned when young age not to waste money on new vehicles. The fuel injection wiring harness provides power to the injectors and the oxygen sensor, which determines how much fuel is needed for maximum efficiency. Verify you can pulse the injectors manually (with an injector-pulser gadget or a home-made equivalent using a push button switch), and that they only squirt gas when the pulse is on. With the car running, it may be hard to see because multimeters are so slow, but you should get a pulsed battery voltage. From the beginning, I've been visualizing the wrong type of injector for this application. Fuel injectors have come a long way in vehicles since they were introduced commercially in the mid-1900s. In all my years of work, I can remember maybe twice I damaged an O ring installing it.
Verify none of the injectors squirt any gas during cranking when they are completely unplugged from the wiring harness. I have also added fuel to the fuel tank (from a slip tank in the bed) - about 3/4 full now v. 3/16 when the pump quit on me last 2, 2012 · After removing the intake air plenum, the injector wire connector (X104) is visible. However, as soon as I accelerate it runs smooth until its at idle again. Injectors 2, 3, and 4 are red, yellow, and white.... red with black stripe is power. A broken connector will not stay in place, and must be replaced in order for the vehicle to be reliable and safely driven. Truck owner operator salary Chapin, South Carolina, USA. Now I have pulse ground and battery correctly at the injectors, good spark, good fuel pressure at the shrader valve, but no fuel thru the injectors. If I can, do I need to make special allowances for the potentially high-heat environment? Jetronic / Minitimer ( EV1) Style Male Fuel Injector Connector Kit.
Prentice hall world history textbook pdf This electrical ground is provided by the ECU via 5 individual injector wires, routed through the ECU where the ECU controls the fuel injection timing and duration, and then to ground via pin 14/55 on the ECU. If the injectors are not plugged in, then the system primes and the engine cranks normally and no evidence of fuel is seen. If that checks out, THEN cut the wire, as Andy suggests. I have a parasitic loss somewhere as the battery loses voltage daily. The problem still is their - not firing on No1 injector and the fault shows as No1 injector with open circuit. The car has about 95K on it and the gaskets look like they're in good condition (no idea if they've ever been done), but maybe it's a good idea to replace since I've gone through the effort of removing the manifold? A short in the wiring to the injector can burn out the fuel injector driver in the PCM.
Many service manuals specify to lube the injector o-rings with engine oil... not sure if this applies to your engine, though. The O-ring can become, hard and brittle, from the heat of the engine. 95 NYG ACR Coupe (restored). What are Fuel Injectors? Using a multimeter will help in troubleshooting the wiring system of your vehicle's fuel injector harness. 3L Ford Ranger Fuel Injector Wiring Diagram for Fuel Injector Wiring Diagram, image size 618 X 850 px, and to view image details please click the image. They should all be around 12 volts. Store SKU #1003694689. Injector/wiring ground problem? Anyone that needs parts to fix these problems please feel free to reach out to Dobeck injector #1, the 12v power wire is black with a red stripe, and the ECU wire is solid light blue. The wire bundle the injectors or in, works it way back to the driver's side of the cyl head, then crosses over to connect to the PCM. Not Allowed: to create new topic. If your injector belongs to the high impedance category, which is the common type, you should have a resistance range between 12 to 17 ohms.
Does the fuel injection ground wire go onto? The issue we are having is that the engine will only run if you hot wire.. 16, 2012 · The entire fuel pump system consists of a cut-to-length power wire and connector for the fuel pump on one end and the relay on the other. They can clog up, which will decrease the spray inside the cylinder. I'll stop clogging the boards now. Long time sufferer of chronic, repetitive cerebral flatulence. However the results of the tests have provided confusing results and I am no closer to identifying cause of problem. Ground wire (tan) D^ was intermittent, mostly open. Where are all the fuel injectors getting their continuity to ground and why would the Fuel Pump Relay affect the results when the Fuel Pump Relay is only supposed to provide + power to the injectors? You can do this from the injector plugs on the ground side with all PCM connectors connected. The injector itself doesn't care which terminal is positive and which is negative. This can be examined without hassle as there will be considerable fuel spilled around the injector. If this were some other kind of electronic device I wouldn't hesitate to cut out the bad portion, solder in a new bit of wire, and close up it all up with shrink-wrap... but I'm not 100% certain this would be a good idea in this situation.
The stiffened harness on the other hand is easily breakable and with continued use of the car, cracks start forming and soon pieces start to fall off. 87 Chevy Tbi Wiring Diagram - Search Best 4K Wallpapers 3lt Wiring Problem At Block Just Below Steering Looking For A Headlight Wiring Leaking Externally Or Internally. A single injector ground can pull loose, break, etc. Step 2: Set up DVOM to measure DC voltage. In mechanical fuel injection, fuel is controlled by a mechanical regulator assembly and it is being replaced by EFI. Efficiently prevents potential engine damage for reliable use. • This adapter comes completely assembled and is 'plug and play' ready to use. An injector spraying steady would seem to indicate that as soon as the AS relay energizes the injectors turn on, this would indicate a possible short to ground on all of the injectors exhibiting this problem, 3 in your case. The other wire is the 'negative' pulse that actually fires the injector.
You simply hook up the two connectors to their intended locations and attach the ground wire. During this process, ensure that the different wires are not in contact. Learn how to install a bypass and deadhead style fuel pressure regulator. A lower reading means there is excess resistance in the wire somewhere. That's when trouble struck. The parasitic draw will have to be diagnosed on its own. I will post the complete Engine Performance schematic, in the morning.
Full factory options - AWD, rear AC, towing package, leather seats,... Springfield, Illinois. Post your repair questions here. Sunshine strain allbudJan 12, 2012 · Every ground wire is a different color on the 8 individual injectors. Any major difference and that injector should be inspected to make sure that it is firing correctly. Tests: 1. with cyl4 injector plug disconnected and using test light across the injector plug terminals with engine cranking, the test light stayed on confirming constant ground signal. Oh and i have two different PCMs iv been using to test. I'm still stumped and confused by the results. Do the injector ground wire continuity tests with all connectors unplugged. If you again isolate the harness from the PCM and redo the tests while wiggling the 5-pin connector and still find short(s), you can probably rule out the PCM. There is still enough good wire between the connector and where the wire branches off from the main harness that I think I could do it). Realized I was mistakenly testing for short before on the non signal wire. The issue is the same with both except one of the PCMs allows fuel spray without cranking and one doesnt. The car sat for the... 15.
0 mV drop between ground wire (from OEM wiring) at Raptor relay and negative battery terminal Tonight truck ran for at least an hour - no issues - pump body got nowhere near hot - I would call it luke warm. If you're unsure about the correct resistance level of your vehicle, you should search online or check your vehicle's guide. Damaged O-Ring Causing Injector Leak. They set my local dealer (Summit Motorsports) up today with replace plugs for the injector, terminals and seals. Terminal tools work on most conventional terminals as well as pack-con and weatherpack terminals found on GM vehicles. It looks like the wire goes to 4 different places?
Wondered if the short was intermittent based on position of the connector) This time with KEY ON OR OFF, the meter read shorts to the ground side of the injector harnesses. They served as a replacement for the older Carburetor in vehicles and are very important in fuel distribution. One is black and the other three have black stripes on green, pink, and blue.