Question about Volkswagen Jetta

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1998 VW Jetta GT Battery light started coming on yest. car drives ok. when rpms get past 4000, light goes off. drops to 3000, light comes back on. just now, airbag light came on batt. light faded and digital display, clock, mileage, went out. New battery? Alternator? please help

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This is issue with the Alternator.
This link will help you check....

http://www.expertvillage.com/video/20323_car-battery-change-test-charger.htm

http://www.wikihow.com/Check-an-Alternator

Thanks
Kevin

Posted on May 18, 2009

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Have an fx45.Should the tach read 25-3000 ROMs when moving at 75mph? Auto tranny seems like it should be in higher gear.


there is not info to be able to give a definite answer
to work it out
you have top know the diff ratio, wheel tyre circumference to be able to work from rpms of the engine to road speed
However as a pointer, most cars will be around 3200 rpms at 60mph as this will be direct drive and od causes a drop in rpms
Being an automatic find yourself a good section of low traffic road and start from stop slowly increase the rpms and watch the rpms. keeping the accelerator steady you will see when the auto changes by a drop in rpms. slowly increase road sped until you see the next drop in rpms and so on. Over drive normally comes in around 55 mph or around 3000rpms
I would think that it is working because 3500rpms at 75mph is reasonable rpms to be expected. If it wasn't working I would expect the rpms to be around 3800 to 4000.at 75mph

Feb 07, 2015 | Cars & Trucks

1 Answer

1998 VW Jetta GL . When I Put My Hand Break Down , Brake Light On Dashboard Doesnt Come Off Completly , In That Case HeadLights Wont Come On When HeadLight Swtich Is On .


the emergency brake needs adjusting. the cover around the e-brake should be removed, and behind the e-brake arm should be a cable and tighten the nut on the end of the cable until the slack is removed from the cable. turn nut, then turn key to accessory, then release e-brake , see if the brake light goes off, if not turn off ignition, tighten e-brake nut again, turn key back to accessory release e-brake, see if light goes off. do this until you see e-brake light on dash go out. headlights should come on.

Feb 12, 2011 | 1998 Volkswagen Jetta

2 Answers

How do you reset the timing on a 1998 VW Jetta?


a car of that year should have an ecu controlling fuel air mix etc. this normally controls the timing.
To reset the ecu on my '95 VW Golf disconnect the battery (negative / black terminal) for 15-30 minutes depending on who you ask. So I do 30 minutes.
If it has central locking make sure you don't leave the keys in the car when reconnect it. swich on the ignition without starting the engine so the dash lights up with the oil light etc. for 30 seconds then off for 10 seconds. then start your car. It will relearn so it will run a bit rough for a while but should settle down. take it for a spin on different types of road ie. slow and fast.

Nov 22, 2010 | 1998 Volkswagen Jetta

1 Answer

Start car and the idle goes to 3000 rpm, holds there for around 12 seconds or so and then comes down to around 1200. when driving if stopped and you put the car in park or nuetral the idle will go up to...


it sounds like a vacuum leak to me, my car had the same problem but when i changed the hose that connected the valve cover to the fuel injectors the rpms dropped back down to about 800 rpms

Sep 17, 2010 | 1999 Saturn SL

1 Answer

1998 vw jetta turns over but won't start check engine light on


The coil pack on these are bad about being defective. You need to check to see if you have power coming from your coil pack. If you do not try changing it out, this produces 60k +/- volts that goes through your ignition wires, to your spark plugs and ignites the gas on combustion with the piston. If it's not giving off a spark, thenyou're not getting power to fire off the engine.

Dec 11, 2009 | 1998 Volkswagen Jetta

1 Answer

Mi carro vw jetta se calienta y ya le cambie


remove upper hose on coolant bottle hold over bottle with cap off have someone in car hold rpms at 3000 if no coolant comes out you need a water pump

Jul 26, 2009 | 1998 Volkswagen Jetta

1 Answer

Loud noise at 3000-4000 RPMS


Sounds like a catalytic converter shield is lose.

May 14, 2009 | 1991 Ford F250

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