Question about 1997 Audi A4

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97 a4 will crank up, but won't start. maybe fuel?

The battery is fine, I checked the spark plugs, and my next step is to put a fuel injector and carb cleanser in. I think it may be the fuel pump, or injector, maybe the filter? does this seem like something i should attempt before I take it in to a mechanic that will charge me an arm and a leg?

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  • ladylorraine Mar 08, 2009

    Hi there I have the same problem with my Audi a4 1997 model. Drove about 3 mile then loss of power. Car came to a halt. Plenty of battery power just wont turn over. Have tried to bump it still nothing.

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It is the Fuel Pump and Possibly the Fuel Filter Both Causing this no Start Problem.

Posted on Jan 23, 2009

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Sounds like you have either a shorted fuel pump driver ground or a sticking fuel injector or injectors. Remove the injector electrical plugs and see if it still flood if it does then then one or more injectors are defective, if not then the engine wiring harness is grounded to one or more injectors or the PCM (powertrain control module) is defective. Remove the spark plugs to ID which cylinder is defective, disable the ignition system when you do this or the gas squirting out the spark plug hole can ignite (been there)

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And what does it do now? Does it crank over and not start, or just no power anywhere? If nothing, no power, recheck your battery connections, grounds, for something jarring loose, maybe a relay in the power distribution center (by your battery) jumped out of its socket. Gotta check around...But if it cranks over, but won't start, you need to review the basics for this condition: needs fuel and spark to run. Are you getting fuel up to the engine? Can you hear the fuel pump buzz on for 2 seconds when you turn key on? That 2 seconds is to pressurize the fuel line. When you start cranking, your pump will come on again, and stay on when engine is running. You can only HEAR the pump when someone turns key to on, and you stand or squat near the tank to listen for it, maybe with tank fill cap removed. If you cant hear the pump your FP relay would be the next place to look for a problem of no power to pump. If pump IS working, then back to engine: check if ignition (spark ) is working. Easiest way: pull spark plug wire, remove plug and put it on the wire you pulled off. Ground the threads of plug on metal of engine, have someone crank it, and watch for spark at that plug. If no spark, check another wire with same plug. No spark means you need to diagnose your ignition starting circuit. Among other things, this involves checking for power to coils, power to the computer (your check engine light DOES come on when key on, right?), a lot of things that a diagnostic flow-chart covers to pinpoint the problem. A good repair manual could walk you through it, if you have a multimeter. If not, you may need someone to help you. If you DO have both spark and fuel up to engine, it's simplified some, but still problematic. Crank position sensor? injector circuit? Good luck, M>, and don't give up.

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Do you have a code for a misfire?

If a crank sensor goes bad the vehicle will typically not start at all.

If you have spark to all the cylinders than the next step is to either check compression or check the injectors. Usually the injectors will stick when this happens they will ohm out fine but will not spray fuel. To check them you will need either a high end scan tool or and injector tester and an fuel pressure gauge. The tester is connected to the injectors one at a time using the bulk connector near the alternator. The injector is then triggered by the tester as you watch for a drop in fuel pressure. Whichever injector does not drop fuel pressure when triggered is the bad injector.

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is the fuel spraying into the cylinders? pull a plug and see if they have fuel on them.....If not you have a problem at the injectors if there is pressure on the rails. If fuel is present you aren't firing strong enough to ignite the fuel. pull a plug and put the wire on it and touch it to a ground and check to see if it is a good blue spark or a weak white or yellow spark...If no spark check for dead plugs or distributor module,

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1 Answer

When battery is at full charge motor turns over but won`t start. battery has been dead for over a week but still have lights,horn and turn signals. fuel filter is fine. what should i check next. thanks for...


Hi, if your motor turns over ok & appears to be getting fuel, I'd probably check for spark by putting a spare plug in one of the leads & turning the engine over to see if it sparks, if it doesn't spark maybe it's your crank angle sensor/coil etc.

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1 Answer

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Your next step in diagnosis your problem should be to check for spark, you'll have to use a spark tester for this, simply removing a spark plug and looking at it WILL NOT WORK, a spark tester looks similar to a spark plug but it has about a 3/4" gap.

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If you don't have a multimeter just try jump starting the vehicle.

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