Question about 1992 Volkswagen Jetta

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Jetta2 f/injection i jumped wire from relay to ignition and got car started, after i sprayed engine cleaner and had the distorbutor covered with plastic - used water spray after this the car refuse to start. please help me.

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Does the engine crank?

Posted on Jul 22, 2008


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I have a 1987 chrysler conquest tsi and fuel pump only runs when key is on start not on run but pump fuel lines not hook only power wires to pump is this how it works?

What does it do with the lines hooked up ? Most fuel injected vehicles need an RPM signal to let the computer know the engine is running to let power continue to the pump .

Feb 04, 2016 | Chrysler Cars & Trucks

1 Answer

I have an 2004 chevy impala that has gas a new starter, new switch ignition, and new fuel pump installed. Why is my car still not starting when I go to crank it up?

Sixty years ago my daddy told me an engine needs four things to run:
  1. Fuel
  2. Air
  3. Compression
  4. Ignition
Air is generally a given, and you can hear compression--the sound the car makes while cranking, the rhythmic sound.

Fuel: Crank it for a bit and then remove a spark plug. If it's not wet, there's no fuel. Possible clogged fuel filter, blown fuel pump fuse, or fuel pump is disabled because automotive security thinks you're using a fake key. You can also test for no fuel by getting an aerosol can of carburetor/throttle body cleaner and spraying it in the inlet while someone else cranks the engine. If it runs as long as you are spraying, there's no fuel.

Ignition: Take off one spark plug wire at the plug. Insert a plastic-handled screwdriver into the wire-end. Hold the handle so the screwdriver shaft is within 1/4" of any engine part. While someone cranks the engine, you should see a blue spark jump from the screwdriver shaft to the engine if there's ignition.

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Oct 02, 2015 | Cars & Trucks

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Car was running fine,went to store,come out turn the key,plenty of crank,but just wont fire,whats my next step?

Determine if it is an ignition or gas failure. Does the fuel pump still work? Do you have gas up to the engine? Watch the injectors for spraying a cone pattern of fuel when car is cranking-that is, if the car is throttle body injected. If multi-port injected, you cant see the injector spray, so check for fuel at the engine fuel rail, or crack the fuel line at the engine to see if fuel is under pressure. The correct way is to check fuel pressure with a gauge, barring that, see if fuel is getting to the engine. If not, pump may have quit.
To check ignition, pull off a plug wire and check for spark when cranking. Be careful of shocks, hold wire with a glove or heavy rag, push the rubber boot back to expose the metal end of plug wire, and hold the wire 1/4 inch from a metal piece on the engine. Have a helper crank the car over and observe spark jumping from wire to ground-a good spark is a blue, snapping spark. Good ignition. A weak, inconsistent, or orange spark is a sign of ignition problem, possibly a bad coil, bad ignition module (the TFI module), or other ignition component.
If you have good spark (good ignition), and still unsure of fuel, spray some starting fluid or carburetor cleaner into the air intake and crank the car over. If it runs for a few seconds and dies, you know gas is the problem. The pump has quit or the fuel filter is clogged. You may even want to try this first, cause if it tries to run, you know ignition is good, and gas is not getting to the engine. Good luck.

Mar 17, 2013 | 1990 Ford Tempo

1 Answer

What do you do if you cant get your 1992 ford f250 to start?

Start with the basics. To run, the engine needs fuel, air, ignition spark, and compression. So one should verify the fuel pump is working and fuel is getting to the engine. When you first turn the key to on, the pump should come on for a brief second or two to prime the lines with fuel. If you don't hear it come on, spray inside the intake with starting fluid or carb cleaner and see if engine tries to start. Does it at least fire and try to run? If so, the pump needs testing to see if it is bad or wiring to the pump is the problem. If the pump is working, the next thing is to check for spark on a spark plug wire when the engine is cranking. You can buy an inexpensive spark tester at a parts store, or just pull a spark plug wire off the plug and hold the metal wire terminal end 1/4 inch from a metal piece on the engine. Use a glove or heavy rag to hold the wire and have someone crank the engine over. To verify ignition is good, you need to see a strong blue spark consistently when the engine is cranked over. If no spark, the ignition system is the problem, and further testing of the system is required. Best done by a well-equipped shop. If pump is working and you have spark, but still won't start, either check fuel pressure with a pressure gauge (correct fuel pressure is very important!), or check that injector circuit is working and injectors are spraying fuel into the intake or into the cylinders, depending if you have multi-port injection, or throttle body injection (or central point fuel injection, I think Ford calls it).
Plenty of other things to check, but sudden no-start problems are usually because of fuel or ignition failure. If you haven't changed the gas filter or air filter in some time, that is a good place to start.

Feb 24, 2013 | Cars & Trucks

1 Answer

Car wont start even with jump cables

Just spinning the engine will not fix the problem. You need to know whether you are getting fuel or whether you are getting spark.
The fuel is easy. Get a can of starting fluid and briefly spray into the air cleaner 1 squirt and then try to crank the vehicle. If there is an attempt to run, you have fuel problems. If it does not attempt to run try 1 more squirt. No run means you have no spark.

It can mean there is a problem with the firing system, like timing belts or chain, or a dead coil. Your car may have Relays for both the fuel pump and the ignition.

Go to and register your car for free, then download the chassis wiring diagrams and fusebox layouts. Find the Relays. If you have no fuel, check the fuel relay. If you have no spark, check the Ignition relay. On American cars, the horn relay is often the same part number as the Ignition relay or the Fuelpump relay and can be switched.
The horn can be used as a test for the other 2 relays to find the bad one.

I hope my solution is helpful.

Apr 04, 2012 | Volkswagen Polo Cars & Trucks

1 Answer

Fuse and relay for the fuel pump

The fuel-pump relay unit is responsible for turning the fuel pump on when it detects the engine is running. When the ignition signal stops, the fuel-pump relay switches the pump off. Problems with the ignition and starting the vehicle often can be traced to the condition of the fuel-pump relay.


  • The fuel-pump relay is a small unit, typically enclosed in a plastic case. The unit contains several sprockets on one side that are clipped onto the ignition system. The fuel-pump relay is engaged only during the start cycle. If it is faulty, it can take longer to start your vehicle.
  • Location
  • Most fuel-pump relay units are located under the dashboard near the steering column. In some cases, the unit is located in the area where the steering column is mounted or near the engine's firewall. The end of the fuel pump relay is typically located near the center of the floorboard, under the carpet in the front section of the passenger's or driver's side footwell.
  • Considerations
  • In addition to difficulty in starting the vehicle, symptoms of a poorly functioning fuel-pump relay include the following: the car dies then starts a few minutes later; the fuel pump makes a strange noise (humming or clicking loudly) for longer than five to 10 seconds after starting; or the engine won't start after you have engaged the fuel-pump switch.
  • Troubleshooting
  • When your car does not start properly, you can conduct a fuel-injection relay test. Two relays are located inside the fuel-injection system; one of them is responsible for turning the ignition on without turning over the engine, and the other is responsible for turning on when the engine turns.

    You can check to see if the first relay is working by touching it while turning the ignition on and off. You should feel a "click" every time you switch the ignition. If the fuel-pump relay is not working, you can "jump" the unit with a small lead jumper cable. You will need to access the fuse panel and insert the cable into the relay unit; the unit will run as long as the wire is inside the relay and can help start your car.
  • Jan 15, 2011 | Chevrolet Lumina Cars & Trucks

    1 Answer

    Code P1420 suggests replacing the secondary injection pump relay, where is the relay?

    17828/P1420/005152 - Secondary Air Injection Solenoid Valve (N112): Electr. Malfunction Possible Causes
    • Secondary Air Injection Solenoid Valve (N112) faulty
    • Secondary Air Pump Relay (J299) faulty
    Possible Solutions
    • Check Secondary Air Injection Solenoid Valve (N112)
    • Check Secondary Air Pump Relay (J299)
    The secondary air injection pump relay (J299) is inside the engine compartment, left side, behind air cleaner housing, under a black plastic protective cover you can lift up to reveal it. It's near the brake fluid reservoir beside the odd black plastic cover for the wiring harness beside the shock absorber tower.

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    Jun 17, 2010 | 2000 Volkswagen Beetle

    3 Answers

    1995 Toyota Camry fuel problem. Engine turns over but not starting. fuel pump fuses OK. Opened diagnostic box and used wire to jump to +B contact with ignition on. No response.

    Along with the fuze, there is also a relay in the system. If the relay is defective you will not have any power to the pump. Best to check for current at the pump connector (near or at the fuel tank) with either a test light or volt meter. If you have power, the pump is bad. if not, check the relay and retest.

    Hope this helps

    Aug 21, 2009 | 1995 Toyota Camry

    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

    1 Answer

    2002 ford taurus won't start at first crank in the morning

    remove the air filter housing from the throttle body, or if its mult-ported injection, remove the large air duct. Do this the night before. The next day, before cranking and having a spray can of carb. cleaner, spray a couple of shots of carb cleaner either into the large air duct, spray towards the engine, or if its single body injection, spray directly on to the throttle body.

    Crank engine immediately, preferrably have some one else sitting in the car to start it after you spray.

    If the car even tries to start, replace cold start relay.

    Nov 22, 2008 | 2003 Ford Taurus

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