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Malfuntion of the fuel injection due to heat of relay

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What's The Main Factors Affecting the Quality of Injection Mold


There are many factors that may affect the quality of the plastic products in the process of plastic injection mold, and they can be summed up as follows:1. Plastic MaterialsThe complexity of plastic materials' performance determines the complexity of the injection mold process. The performance of plastic materials varies greatly due to their different varieties, grades, manufacturers or even different batches. Different performance parameters may lead to completely different moldings.2. Injection TemperatureThe melt flows into the cooled cavity and losses its heat due to heat conduction. At the same time, the melt generates heat due to shearing action, and this part of the heat may be more or less than the lost heat caused by heat conduction, which depends on the injection conditions. The viscosity of the melt becomes worse with the increasing of temperature. In this way, the higher the injection temperature is, the worse the melt viscosity becomes and the smaller the required filling pressure needs. Meanwhile, the injection temperature is also limited by the thermal degradation temperature and decomposition temperature.3. Mold TemperatureThe lower the mold temperature is, the faster the heat loses, due to the heat conduction; the lower the melt temperature is, the worse the mobility becomes. This phenomenon is particularly obvious when we adopt a lower injection rate.4. Injection TimeThe influences of injection time on the injection process are in three aspects:(1)When we shorten the injection time, the shear strain rate of the melt will increase, and the injection pressure which are used for filling the cavity should also be increased. (2) When we shorten the injection time, the shear strain rate of the melt will increase and the melt viscosity decreases due to the shear thinning characteristic. The injection pressure should also be decreased in order to fill the cavity.(3)When we shorten the injection time, the shear strain rate in the melt as well as the heat productivity will get higher, and meanwhile, the heat lost due to heat conduction is only a little. Thus, the higher the melt temperature is, the worse the viscosity becomes. And the injection pressure should be decreased so as to fill the cavity. As a result of the above three factors, the curve of the injection pressure which is required to fill the cavity presents in a "U" shape. That is, there exist an injection time when the required injection pressure is minimal.

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Oct 09, 2017 | Cars & Trucks

1 Answer

Automotive problem


from what.. emissions controls, vaqcuum leaks, fuel injection malfuntions..ac controls settings..

Feb 10, 2013 | Cars & Trucks

1 Answer

Parking light will not go out when you turn off motor had to take batter cable loose


there is a "daylight" relay thats malfuntioned on the vehicle this turns the daytime lights on and aperently yours need replaced due to relay burnout..

Jan 19, 2013 | 1999 Oldsmobile Intrigue

1 Answer

I have a 1998 plymount voyager. When I put it in drive, it shake like it's going to die. It shakes more when turn on a/c or heat. What is my problem?


It could be a fuel injection problem or even an ignition problem. It sounds like the idle speed is too slow, probably due to a misfire. you can buy a manual at your local parts store that will guide you through checking out these systems for about thirty bucks.

Dec 09, 2012 | 1998 Plymouth Voyager

1 Answer

Fuel pump relay malfunation on 1994 chev G20 sportvan


bloked fuel filter will give same reading as starvation , check filter .

Mar 20, 2012 | Chevrolet G20 Cars & Trucks

2 Answers

1993 rodeo not running no power to fuel pump


if there is no power to the fuel pump check relays and fuses....UNDERHOOD FUSE & RELAY PANEL IDENTIFICATION Fig. 2: Underhood Fuse & Relay Panel Identification Courtesy of ISUZU MOTOR CO. Fusible Link Identification ? A - 80 Amp (1991-92 3.1L) ? A - 60 Amp Main-1 ? B - 30 Amp Main-2 ? C - 30 Amp (1993-94) ECM (3.2L) ? D - 30 Amp Condenser Fan (A/T Models) Relay Identification ? 1 - Headlight Relay ? 2 - A/C - Heater Relay ? 3 - Starter Relay ? 4 - A/C Compressor Relay ? 5 - Charge Relay ? 6 - Fuel Pump Relay ? 7 - ECM Relay ? 8 - Wiper Relay Fuse & Circuit Breaker Identification ? 1 - 15 Amp (1991) ECM, Fuel Injection System ? 1 - 15 Amp (1992-94 2.6L) ECM, Fuel Injection System ? 1 - 10 Amp (1992-94 3.1 & 3.2L) Heated Oxygen Sensor, Fuel Injection System ? 2 - 20 Amp (1991-92) Fuel Pump ? 2 - 20 Amp (1993-94 2.6L) Fuel Pump ? 2 - 15 Amp (1993-94 3.2L) Fuel Pump ? 3 - 10 Amp (1991) ? 3 - 15 Amp (1992-94) Turn Signal Lights, Hazard Warning Flasher Lights ? 4 - 10 Amp Horn, Door Locks ? 5 - Not Used (1991 3.1L) ? 5 - 10 Amp Charging System, Charge Warning Light WARNING: Always disconnect battery ground cable before servicing "high- current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician. Page 1 of 2 FUSES & CIRCUIT BREAKERS -1994 Isuzu Rodeo LS? 6 - Not Used (1991) (1992-93 2.6L) ? 6 - 10 Amp (1992-94 3.1L & 3.2L) A/T Interlock System ? 6 - 10 Amp (1994 2.6L) Heated Oxygen Sensor, Fuel Injection System ? 7 - 20 Amp Heater/Air Conditioning Blower Controls ? 8 - 10 Amp Air Conditioner Compressor Controls ? 9 - 10 Amp Right Headlight ? 10 - 10 Amp Left Headlight © 2008 Mitchell Repair Information Co., LLC.
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Underhood fuse block swap out relay #7 thats the ECM relay.
Ground Circuits Using a DVOM, touch negative voltmeter lead to a good ground. Touch positive voltmeter lead to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If reading is greater than one volt, check for open, corrosion and loose connection on ground lead. See ECM GROUND LOCATION table for ECM ground location.
Page 1 of 1 SYSTEM/COMPONENT TESTS - 2.6L EFI -1994 Isuzu Rodeo

Mar 28, 2010 | 1993 Isuzu Rodeo

1 Answer

The motors dies after the engine heats up


Does the check engine light come on? If it does check for codes. Your problem could be the ignition module or main ignition relay may be over heating, EFI (electronic fuel injection), vapor lock. It could be your fuel pump over heating or there is a problem with the distributor. Good luck

Mar 02, 2010 | 1996 Mitsubishi Galant

2 Answers

1988 Ford F350 engine turns but wont start


I had a similar problem. My truck would start fine until it sat after running a while and I shut it off for ten minutes or so.The engine heat heat would rise to the deisel fuel injection pump and the truck would whirl over when I tried to start it, but it would not fire. There is a spring in the fuel shutoff on the injection pump that expands with heat and, as it gets older, sticks so that the solenoid doesn't open. I found that a small amount of cool water poured on the pump would cool it enough to start.

May 15, 2009 | 1994 Ford F350 Crew Cab

2 Answers

Wont start when hot!


hello there, wow my dream p-up. nissan pathfinder 4x4,  unfortunately i have to settle with my nissan navara truck. anyways, the possible problems would be the injectors and injection pump. injectors are really direct on the combustion chamber so everytime the engine runs it is severely exposed to very high temperatures. the nozzle tips are the ones very much abused. the injectors have 2 seals. the first one which hugs the body of the injectors which is usually made of hard copper and the 2nd is called the chamber washer which is a stainless steel type concaved washer which serves as the nozzle tip seal and heat nozzle tip heat dispenser. if the nozzle tip floats there is a tendency that the tips are flame red due to heat thus, diesel is boiling to the point of turning to vapors enough to push the remaining fuel back to the injection pump when you shut the engine. then the one way valves of the injection pump comes into play. the valves might be weak and due to the high pressure, fuel slowly creeps back into the pump body. hope this helps.

Apr 16, 2009 | Nissan Pathfinder Cars & Trucks

1 Answer

1991 pontiac 2.5 tech 4 fuel pump relay wont energize


Look for a bad fuse or relay. If both check out, most likely an ECM problem

Mar 07, 2009 | 1991 Pontiac Grand Am

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