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2nd gen. 5.2l ram 1500 - no start - need some help!

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Old Dec 6, 2021 | 06:04 PM
  #11  
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Originally Posted by Ramman18
Regardless, a leaking plenum gasket has no bearing on the engine starting. All you need is fuel, spark, and air. EFI and computers make it a bit more complicated but don't overthink as you diagnose. Not talking down just keep it simple as you work the problems.
this has been my thought but when recently asking about my issue with a local mechanic, he mentioned it could be this cause.
in the most simplest terms, feel like it could be related to possible timing or as mentioned earlier (fuel sync). It’s truly troubling that you can no longer trust the quality of replacement components.

this has been a tough one and I hesitate to take it to a mechanic which can turn into the same thing them just thrown parts at it until it’s fixed costing me a fortune. With that said, I really do appreciate the feedback I’m getting here on the forum before I start to lose my direction.

thanks again all.
 
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Old Dec 6, 2021 | 06:33 PM
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cap /rotor with new plugs.
What plugs are you using?
When the cam sensor was replaced this can be done without moving or removing the distributor. IF it was moved or removed the fuel sync needs to be set.
I hesitate to take it to a mechanic which can turn into the same thing them just thrown parts at it until it’s fixed costing me a fortune.
If you take it to a mechanic that has a scanner that reads live data there should be no "guessing" what parts to throw at it. How long has this issue been happening? Is it possible it has bad fuel? Have you tried spraying starting fluid down the throttle body and see what happens?
 
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Old Dec 6, 2021 | 09:06 PM
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Originally Posted by Moparite
What plugs are you using?
When the cam sensor was replaced this can be done without moving or removing the distributor. IF it was moved or removed the fuel sync needs to be set.

If you take it to a mechanic that has a scanner that reads live data there should be no "guessing" what parts to throw at it. How long has this issue been happening? Is it possible it has bad fuel? Have you tried spraying starting fluid down the throttle body and see what happens?
I purchased/installed Accell Copper cap/rotor with platinum plugs. I’d but more than willing to try another brand but currently I see plenty good spark.

Yes, when the cam sensor was replaced the cap/wires were just moved out of the way to install. The distributor was not moved in any way. So unless the replacement cam sensor is defective I think we’re good there.

Agreed, I also thought of bad gas (since the tank was just filled the day before). However, there is NO effort to start utilizing starting fluid. Also, as a precaution added a can of dry gas as well.

Currently, the only scan tool I have access to is one of those Blue Diver. It not been real cooperative in effort to get real time data especially when it only just seems to be cranking. If I do get it to work better or access to another scanner is there something in particular that you would be looking for?

Important note: this is a manual transmission. The reason I bring this up, is there are two different Crank Sensors (one for the manual transmission has a cream colored electrical connector we’re the auto has a black colored).
the first one I purchased was for an auto even though they said it would fit - returned.
purchased a second one (correct for manual) but the wiring color was reversed - didn’t trust, but tried. Didn’t make a difference - trashed.
lastly, I purchased, what I’d call on the expensive side with good reviews even for the manual transmission but returned as it made no difference.

one of the key take always, related to the Crank Sensor, is I’m still unsure what’s correct as what I should see if ohm’d out. I do recall when comparing my original with a new one (can’t remember which one but it was correct for manual) it didn’t seem to match…this was one time I thought I found the problem but, no.
I currently have the original one back in the vehicle. I’m not sure what most people see when these Crank Sensors fail: no spark, intermittent spark, etc. I’d love eliminate this out of the troubleshooting mix but can’t say I’m Comfortable doing so at this point. Would consider purchasing another brand that people suggest or factory if I could truly determine it was bad.

I must continue to say I really appreciate everyone’s time and feedback on this one.
 
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Old Dec 6, 2021 | 09:08 PM
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Put some standard copper plugs in there. See if it wants to run.
 
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Old Dec 6, 2021 | 11:33 PM
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As for the scan tool question, these older trucks don't volunteer much information over the OBD2 port. Chrysler chose a very slow one wire interface for the required OBD2 functionality and there is another bus (SCI) that is faster and has more functionality. Unfortunately that means you'd need a "shop level" tool as the run of the mill OBD2 readers simply don't talk on that bus. However it sounds your problem is so fundamental that a better scan tool might not help.

If it doesn't even try to start on starting fluid I'd suspect the ignition. Check that the distributor is spinning and double/triple check that the rotor points to the notch when cylinder 1 is at TDC on the compression stroke. That should also get the fuel sync set ballpark within the limits.
 
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Old Dec 7, 2021 | 12:44 AM
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Tried push starting it? Does it even cough or sputter?
 
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Old Dec 7, 2021 | 08:38 AM
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If you still have the old cam sensor, ya might reinstall it. Remember, just because it's new, don't mean it's good!
 
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Old Dec 7, 2021 | 02:54 PM
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Originally Posted by HeyYou
Put some standard copper plugs in there. See if it wants to run.
i may try this.
 
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Old Dec 7, 2021 | 03:36 PM
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Originally Posted by DerTruck
As for the scan tool question, these older trucks don't volunteer much information over the OBD2 port. Chrysler chose a very slow one wire interface for the required OBD2 functionality and there is another bus (SCI) that is faster and has more functionality. Unfortunately that means you'd need a "shop level" tool as the run of the mill OBD2 readers simply don't talk on that bus. However it sounds your problem is so fundamental that a better scan tool might not help.

If it doesn't even try to start on starting fluid I'd suspect the ignition. Check that the distributor is spinning and double/triple check that the rotor points to the notch when cylinder 1 is at TDC on the compression stroke. That should also get the fuel sync set ballpark within the limits.
agreed about the obdii situation.

I'm confirm the dist has no movement. I like the idea about checking TDC. Just trying to find some more time and crossing my fingers for a decent day.
 
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Old Dec 7, 2021 | 03:38 PM
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Originally Posted by Ramman18
Tried push starting it? Does it even cough or sputter?
no, and really not able to do so at my location though pulling with another did cross my mind . Thx.
 
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