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98 dodge avenger wont start

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Old 12-01-2009, 07:16 PM
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Question 98 dodge avenger wont start

can anyone help pleeeeeeeeeeeeez?
it has no spark at the spark plug so i changed all sparked plugs wires cap rotor fuel pump fuel filter and battery but it cranks but wont start, it was idling and i hit the gas and she stalled and wont restart please any info please.
 
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Old 12-06-2009, 12:51 AM
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My 1997 V6 avenger sometimes does this thing where when it is warm it will crank forever but not start. I sometimes put the pedal to the floor and it will start. When i did this my rpms went to like 5000 and then to idle. it tried to die on me but i hit the gas and stopped it and then it idled fine. I can always get it to start on like the 2 or 3 try w.o the gas. It will start right away when i prime the fuel pump. put the key in the on position w.o starting it untill the fuel pump stops humming. then start it. hope this helps and i dont really think mine has any major problems. its got 160k on it.
 
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Old 12-06-2009, 08:34 AM
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Go to the 95+ section and read the firewall relay info thread
 
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Old 12-07-2009, 06:47 AM
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thank you for all the info, i will be checking this out and i will post what the problem was when i figure it out (thanks)
 
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Old 12-07-2009, 10:09 PM
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this is actually a pretty easy circuit to deal with, and ill first explain to you how it works then tell you what you should look for...

a constant 12v is provided to the asd and fuel pump relay along with the pcm.

the pcm then has a KEY ON power circuit. when you turn the key on, the pcm now activates all KEY ON circuits (fuel pump is one of them). the pcm does this via a ground signal.

so the asd relay has 4 pins. 12v power constant, 12v power feed, ground, and 12v power KEY ON. the relay always has power via battery/fuse box, then gets power via another fuse when the key is turned on, then gets GROUND from PCM when key is turned on, then has a pin to deliver power to associated relay circuits.

once the relay receives a ground signal from the pcm, it triggers the relay and activates SEVERAL sources via a junction connector under the PCM. it sends power to the fuel pump relay, coil, alternator, crank position sensor, oxygen sensors and a few others.

the fuel pump relay in your case is next in line. it has a fused 12v constant source via battery/fuse box. 12v Key ON power via ASD relay (this is a power activated relay, where as the ads is ground activated), a aconstant ground, then a signal or power output pin (which goes to the fuel pump). At this point once the fuel pump relay gets its power signal from the asd relay it powers up the fuel pump for a time delay of only 3 seconds. the fuel pump gets its own ground fyi via another circuit. after 3 seconds you will not be able to check for power at any of teh ASD powered sources UNTIL you begin cranking or the motor is running.

now you know how the system works, grab a power source, and apply direct power to pumps power pin. if the pump primes and runs you have a good pump w no power source.

this time take fuel pump connector in hand, and a dvom, have someone turn the key on for u while you check for power at the connector to the pump. if you have power then the pump isnt ur issue... if you dont have power, move along to the fuel pump relay. check for power at the power pin from asd relay when you have a buddy turn the key on... remember you only have roughly 3 seconds to cheeck for power b4 the time delay which is set into the pcm turns off. and just keep following the circuit back until you find the problem/
 
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Old 12-20-2013, 08:56 PM
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Default avenger no spark issue

hello my name is russell. i have a 1999 dodge avenger es 2.5l v6 with no spark issue. ive replaced coil in distributor and tested asd relay output at distributor and yes it is getting power. any help would be greatly appriciated.
 



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