Question about 1998 Chevrolet Cavalier

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Antitheft will not power fuelpump

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How do you know it the anti theft device ? Gm is known for bad fuel pumps. Otherise i would disconnect the wiring that interferes with the pump so that will work again. I would consider disconnecting the whole unit because it would be the easiest.

Posted on Jan 08, 2009


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My theft deterant is activated,how can i remedy it?

The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.

Dec 13, 2013 | 2000 Saturn SL

1 Answer

Jeep want start.

Go to for a free chassis and fusebox layout diagrams. Just register your jeep for free. It sounds like a bad relay for the fuelpump.

What many people do not realize is that relays operate both power and grounds. The relay may be switching power to the pump, but the ground wire may also go through the bad relay. Depending on the antitheft design, the grounding wire to the pump may be turned off.

May 01, 2012 | 1998 Jeep Grand Cherokee

1 Answer

Alarm light flash an car will not start. changed fuelpump still have same problem

the anti theft is on car will not start/you need to run scan on car./try to reset antitheft

May 03, 2011 | 2001 Jaguar S-Type

1 Answer

Engine turns over, but will not start

Listen for the fuelpump when you first turn the key. It will run only 1 or 2 seconds and then cut off. If you do not hear it run, there is a switch in the trunk next to the Airride.

This is the Inertia switch and you need to push the button on it and hold it in for 1 or 2 seconds. Then turn your Ignition key and see if the fuelpump runs. It should start fine after this. The Inertia switch is a safety switch and sometimes can trip when a door or trunklid is slammed.

If your vehicle does not start, you still could have a Bad fuelpump relay which you will find in one of the Powerboxes under the hood. There are also Ignition relays for some models, again in a Powerbox. There are scanners which you can use to diagnose the problem.

The antitheft system can interfere with starting. As a last effort you can try to punch n the Doorcode and try to start the car within seconds of entering the code.

Aug 16, 2010 | 1998 Lincoln Mark VIII

1 Answer

2 weeks ago had tune-up done, replace the fuel filter, car still not running right, had the throtle body sensor replace on Wed. and on yesterday replace the fuel pump, truck will turn over but not start,...

I would go down and talk to the Tuneup place. They can have it towed in or send a Mechanic over to fix it. If you live in an area where Mechanics have to be Certified, you can usually Download a Complaint form.

Give the original place the opportunity to fix it. If it was running better before they touched it, its their responsibility to make it right. Make sure the extra things you had done were done right. Check the fuel filter to see if FLOW arrow is pointing to the front of the vehicle. Listen to the fuelpump when you turn on the key.

There is a Inertia switch for the fuelpump cutoff. It will kill the juice to the pump but will not cause an intermittent problem. Check for a Fuelpump Relay in the powerbox under the hood. Bad contacts will cause an intermittent problem and eventual shutdown.

Without giving a lot of detail, ask a Dealer if the Antitheft system can cause a starting problem because you have had problems since the Battery was disconnected while work was done to the vehicle. Ask if there is a RESET sequence for it. Sometimes the Electronic key and matching memory in the antitheft lose the ability to communicate.

I hope this was helpful and would like to know the end result.

Aug 01, 2010 | 2004 Mercury Mountaineer

1 Answer

2008 MZK Ran out of gas, put gas in and the car won't start again. Tried jumping it (several times) Makes a sound like there is no power.

You may get some free help from a Dealer on this because of the Warranty. Lincoln has at least a 4 year coverage. You can try the Inertia switch in the trunk which has a Reset button; you press for 2 seconds to reconnect the fuelpump.

There is also the Antitheft system. Sometimes you need to push the Security code in manually and then turn the Ignition key within 10 seconds. The low battery and jumping the car may have triggered the Antitheft.

Jul 20, 2010 | 2008 Lincoln Mkz

1 Answer

Power to fuelpump

If you find the relay you may not need to run a wire. make sure the relay is working.

Apr 24, 2010 | 1984 Toyota Celica Supra

1 Answer

Will turn over but wont get gas ford windstar van 2000 i think the antitheft is not letting fuelpump work how do i override this

you can not over ride the security system you need to take it to the dealer to be scanned to find out why it is inop

Nov 17, 2009 | 2000 Ford Windstar

3 Answers

Fuelpump problems in my 2003 oldsmobile alero

I was reading another comment about Aleros and thought you might try this. You have an antitheft system that kills the fuel pump. The directions are in your owners manual. What I remember is to turn on the ignition and leave it on for 10 minutes. Now whether you turn the car to start at this point or go back to "off" and then start is the second way. I would try turning the key to start without shutting it off (from the 10 minute cycle). This is suppose to reset the antitheft and you should observe whether the antitheft light is blinking.

If this works for you then you have problems in the antitheft circuit. This would include keys, keyswitch reader, connecting wires and antitheft box. Best of Luck

Jul 31, 2009 | 2003 Oldsmobile Alero

1 Answer

Antitheft will not start

Check your fuses and make sure your battery is properly charged. Try jump-starting the car.

Jan 07, 2009 | 1998 Chevrolet Cavalier

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