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no spark 98 dodge ram 318

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  #1  
Old 12-09-2006, 12:28 AM
blue2050 blue2050 is offline
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Default no spark 98 dodge ram 318

Sitting at a fast food drive through and she just went dead, like I turned off the key dead.
Turns over fast but will not fire. Had to push it to a parking space then have it towed home the next day...it was late.
No garages local could take it this week.
Check engine light never came on.
It has plenty of fuel.

Tomorrow is going to be the first chance I have had to really look at it.
For now I know I know nothing about this engine. I gave up on repairing engines in the 80's. Give me a small block and a carb and I can make it run...add todays computers etc I am lost. However I am always ready to give it a good try before paying someone else.
That was a brief introduction..my first post here. Hello all

What I have found thus far in my 1 hour of before dark, after work, is:
I seem to have no spark. Grounded spark plug will not spark...engine spinning. Fluke meter on DC detects nothing at the coil or the spark plug wire. Replaced the cap and rotor today....never hurts....did not help.
Fuel pump runs.
Check timing tomorrow...but even if the belt or chain jumped it should produce a spark....right????

I simply need some advice on where to start looking or if there is a common issue. I seached this thread 12 pages
All fuses check good.
Any help is greatly appreciated.
Michael
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  #2  
Old 12-09-2006, 03:00 AM
steve05ram360 steve05ram360 is offline
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Default RE: no spark 98 dodge ram 318

welcome to df...

is your CE light coming on? its an indicator that your PCM is active. if so, the crank position sensor is responsible for timing, & the cam sensor for fuel injector timing. start there. if there is nothing obvious, check the coil... they also can go bad.
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  #3  
Old 12-09-2006, 12:21 PM
blue2050 blue2050 is offline
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Default RE: no spark 98 dodge ram 318

Hello Steve,

Yes, the computer goes through the check instument function. All the lights; including CE; come on then go off...normal

Where is the Crank Sensor on this 98 318 Ram w/ auto. I have read everywhere this is the likely problem. However I am old school so I will replace the coil too.

I smell gas slightly when trying to crank it. The air filter is off. I suspect it is injecting.

Whether this is happening at the correct time I will find out when it warms a bit. 22 now.

Thanks again
Michael
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  #4  
Old 12-09-2006, 02:30 PM
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Default RE: no spark 98 dodge ram 318

definalty sounds like the crack sensor, its located on the top right corner of the bell housing. theres 2 little bolts that hold it in and then it lifts straight out. kinda a pain in the *** to get to. but when mine went out i had to change mine while laying in a big leaf pile that my truck was parked over.

i would also recommend the MSD direct replacement coil. its not much more money and my truck seamed to idle much better with it. i think mine was like 50 buxs
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Old 12-09-2006, 03:18 PM
steve05ram360 steve05ram360 is offline
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Default RE: no spark 98 dodge ram 318

yeah if your going to get a coil, get an msd.
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Old 12-09-2006, 03:24 PM
blue2050 blue2050 is offline
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Default RE: no spark 98 dodge ram 318

I browsed all over and ran across a mr fix it; Bob Hewitt. He said if it had a distibutor it has no crank sensor.
I wrote back telling him Napa and some others sell one for my truck.
Autozone says not available for my Dodge Ram 1500 w/318 auto.

I cannot locate it though. There is a sensor of some sort on the bottom left of the tranny tail housing. those wires insultion are cracked and the wire is exposed in several places. Not touching or shorting though. I can see about 6" before the wires enter the harness.
I super 33 taped then for now. Do not figure thats it, tranny speed or whatever. I am going to Autozone to buy the Haynes book for it. They have it now; so they say; did not last time I looked. I always like to have that book for my cars....trucks.

Its been cold here 15 degrees this morn. Mack Hydralic jack has decided to not work so far. Figures.

So your saying it mounted to the transmission. I assume it has to be close to the shaft. The sensor I spoke of is.

I appreciate the help greatly guys. I am and rc plane nut so I am in those forums all the time asking and aswering, these forums are one great aspect of the net.
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  #7  
Old 12-09-2006, 03:44 PM
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Default RE: no spark 98 dodge ram 318

deleted as directed
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  #8  
Old 12-09-2006, 03:59 PM
gcguru gcguru is offline
 
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Default RE: no spark 98 dodge ram 318

Your truck has a crank sensor, if your standing in front of the engine reach behind the left rear corner of the intake manifold, its there.
if the sensor went bad, you wont get a spark anyway (coil will have no volts) the crank sensor tells the PCM if the engine is actually turning or not. also, check if your fuel pump went dead. you should at least hear some buzzing in the gas tank when you turn the key all the way forward. if you hear it, you need to check the pressure on the fuel rail the a high pressure fuel gauge. if no sound coming from the tank, check all relays under hood. sounds like the crank sensor, but it could be a fuel pump ($$$) good luck
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Old 12-09-2006, 05:16 PM
steve05ram360 steve05ram360 is offline
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Default RE: no spark 98 dodge ram 318

Well, Mr Bob is wrong... the crank sensor is located behind the passenger side head and is mounted to the flange where the tranny bolts up. if your wiring is exposed, I'd say you had a short and the wire fried. wiring just doesnt get exposed like that.
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  #10  
Old 12-09-2006, 05:25 PM
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Default RE: no spark 98 dodge ram 318

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  #11  
Old 12-09-2006, 05:51 PM
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Default RE: no spark 98 dodge ram 318

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Old 12-09-2006, 07:57 PM
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Default RE: no spark 98 dodge ram 318

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Old 12-09-2006, 08:10 PM
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Default RE: no spark 98 dodge ram 318

yea go to sears hardware and get a set of rachet wrenches. also try to keep your post contained to one post so your not posting over and over ( double posting) which is against the rules. either edit your post or wait for someone else to respond first.
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Old 12-09-2006, 08:31 PM
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Default RE: no spark 98 dodge ram 318

Here's a pic of the sensor's location. It's taken from underneath the truck reaching up past the exhaust on the passenger side. You can see the two bolts there just behind the transmission oil dipstick tube. The wiring harness unclips up by the distributor cap. Also there's a downloadable service manual up in the "2nd gen ram info" thread at the top of the forum if you haven't found it yet.

[IMG]local://upfiles/32197/E14242B91E9B42DD92EFE1365E51C911.jpg[/IMG]
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  #15  
Old 12-10-2006, 10:12 PM
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Default RE: no spark 98 dodge ram 318

Managed to get the old crankshaft position sensor removed....It looked fine. I compared the resitance of the old and new. They were the same. I installed a new one.
As I said ealier new OEM coil.
Mew rotor and button and wires were new 3 months back.

I still have no fire, she will not crank.
Just turns over normally...I am charging the battery at night.
I do not get the 5 vdc-o when rotating the motor...nothing with either crank position sensor.
I suspect something further up stream, always did, but all the fuses check ok. All of them
THe ASD relay has 12v however I am wondering why I get a negative 12vdc from all the sockets; with power; to ground. Put my Fluke + lead on the battery negative and +12vdc. Seems wrong but I do not know much.
Bought a ob-2 code reader and there is no codes....I killed the battery positive for a few hours.
My reader does show yellow problem...do not know what that really means either....can't read anything maybe?
Every other function on the truck works...that I can check..lights, bells, locks, windows etc. Fuel pump whirs.

I continue to be lost with a dead truck. My only transportation.
Please help. This week is going to be hard to make work.

By the way I have a little 1/4 and 3/8 Craftsman socket set in the truck for emegencies.
I have 1/4 through 3/4 socket sets in Proto I use for auto when my air tools will not work.
I bought a little Stanley 3/8" rotator ratchet. This was the ticket for removing those crakshaft sensor bolts. It works like a normal socket wrench then you can turn the handle to rotate the drive too.

Thanks
Dumb struck Michael
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Old 12-11-2006, 01:55 AM
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Default RE: no spark 98 dodge ram 318

wow that sucks, i would say start putting the timing cover. really couldnt tell you where else to look. your sure the pcm is functioning?
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Old 12-11-2006, 02:37 AM
blue2050 blue2050 is offline
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Default RE: no spark 98 dodge ram 318

No I am not sure of anything.
I assume timing too, still my brain thinks the cpk should send the 5 vdc either way...unless the ASD is killing it
All I know is it does it guage check, relays click and the fuel pump whirs and it turns over and over and over but will not start.
I can't sleep for worrying about this.
Its Christmas, I have kids, I can't afford to just drop it off at Dodge..afraid to anyhow.
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  #18  
Old 12-11-2006, 11:28 AM
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Default RE: no spark 98 dodge ram 318

where do you live, maybe someone here is near you and can help you out (try their pcm in your truck or something)
also pull know good relays (horn, wipers, etc.) and put them in the sockets of the critical systems like fuel pump, pcm, etc) just in case you misdiagnosed a relay. double check all the fuses under hood and inside panel by drivers door. check for continuity on primary coil wire to dist cap (while wiggling wire). if your near me id be happy to scan the pcm for codes.
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Old 12-11-2006, 01:15 PM
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Default RE: no spark 98 dodge ram 318

I would deffinetly pull the distributor cap. I had my rotor slip up into the cap a few months back at 4000rpms and thought I blew up my engine. I could see the rotor slipping up at idle just causing the truck to just die instead of making all the horrific noises mine made winding down from 4000rpms and the spark jumping everywhere.
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Old 12-11-2006, 05:46 PM
steve05ram360 steve05ram360 is offline
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Default RE: no spark 98 dodge ram 318

yank your plugs and see if they are gas fouled. if they are, clean them up and install all but one. then yank the fuel pump relay and put the plug into the wire as normal and ground it. see if the plug is getting spark. if your getting spark, then either the timing of it all is off or the injector timing is off.

did you swap the coil?
did you swap the crank sensor?
was the wiring to the crank sensor ok? IIRC I thought you mentioned that it was burned or exposed 6" up the harness...???

why did you delete all of your posts? makes it hard to figure out what's been done...
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Old 12-11-2006, 05:46 PM
 
 
 
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318, 98, bottom, coil, crack, crank, dodge, dodgeram, located, position, ram, sensor, spark

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