3.5 mystery misfire - Page 2 - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
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post #16 of 96 (permalink) Old 07-07-2012, 12:42 PM Thread Starter
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also ive read a few stories and oil should come out of the penilum? or the upper manifold? i had no oil come out of either is this a problem with pcv valve?

like i already said i already plan to replace it, just wondering
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post #17 of 96 (permalink) Old 07-08-2012, 04:54 AM Thread Starter
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after finishing it all (decided to pass on injectors) i have a no start with code 54 cam sensor not sure weather its the wires or the sensor but is their a way to test each? i dont want to buy a non refundable sensor just for the problem to be in the wires

also the MTV vacuum hose broke when trying to get it back into place so going to get a new one of those as well,,,, i doubt this would cause the no start and code though

i also noticed what looked to be a vacuum line that comes from a wireing harness in the center rear of the engine that feeds toward the driver shock tower then stops as an open line what is this? i cannot find a spot that this would go and their are no connecters on it

she really wants to start, id almost say it does, but its very clanky and dies right away

Last edited by Ruggels; 07-08-2012 at 05:06 AM.
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post #18 of 96 (permalink) Old 07-08-2012, 10:59 PM Thread Starter
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after getting the MTV hose i was able to get her started and the code 54 went away but the original problem of the misfire is still in play.

i cant remember if i said how i have a valve or lifter "sticking", but when she was unable to start last night the valve/lifter was clanking real loud and then when i got her started it continued for a few moments before quieting down to the same level previously. i assume that this is because of a lack of oil and it took a few moments for the pump to circulate it to the lifters

what are the chances that lifter is causing my miss?

Last edited by Ruggels; 07-12-2012 at 09:24 PM.
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post #19 of 96 (permalink) Old 07-12-2012, 09:16 PM Thread Starter
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found where that line went... i was looking all around the engine for somewhere to connect when it ended up being the cruise control... was also surprised to find that the cruise control is controlled by oil because when i was driving and the cruise didnt work (because of disconnected line) i found a rather large oil leak at next stop and began to panic, but after connecting the hose back on the leak went away and cruise came back.

i think im going to try another crank sensor and go OEM since my last i took back after putting it in and it started a ticking comming form the trans.... i also noticed that on first startup after it sat overnight the trans will give the same ticking but will go away at warm op temp, any other suggestions?
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post #20 of 96 (permalink) Old 07-12-2012, 10:17 PM
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Cruise Control is operated by vacuum. If you had an oil leak at that point...maybe a PCV issue? Where Oil in the upper plenum was getting pulled back to the Cruise Control Servo?
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post #21 of 96 (permalink) Old 07-12-2012, 10:35 PM Thread Starter
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i thought it would be weird if it ran off oil press, not sure what exactly it was that caused it then, but its fixxed now... if only this misfire was so easy
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post #22 of 96 (permalink) Old 08-24-2012, 04:02 AM Thread Starter
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UPDATE

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Originally Posted by Ruggels View Post
3.5 ES car will misfire or stumble @ 2000+rpm the problem is worse at exactly 2k rpm where it will miss/stumble repeatedly, or at least every one second..... at above 2k rpm the miss/stumble will happen about every 5-10 sec.... when the hood is popped and listening to the problem you can hear a slight hiss type noise (best i can describe it) coming from cylinder 3 or 5 area but only when the stumble happens.... about once a trip the cruise light will flash only when the stumble happens (usually on freeway at around 2.3k).... also while at idle a small clank can be heard from the #3 or #5 cylinder right where the valves are (its very quite and can only be heard if you really listen or put ear close) my dad said it was a lifter or valve sticking and eaither a oil change or oil additives will fix that?..... tach (means rpm gage right? ) will vary on the misfire its hard to explain, while in park, about 70% of the time the missfire will drop rpm only about 100-200 but other times the rpm will drop 300-600 rpm.

things already tried

1)fixed pinched fuel line
2)replaced fuel filter
3)new crank sensor (ended up new sensor was bad and the original worked better have not tried a new "working" sensor)
4)replaced drive belts/water pump/timing belt/ TB tensioner (more just needed to be done then assumed the problem)
5)replaced faulty coil pack (read 16.4 ohms with new pack reading 12)
6)plugs were replaced about 100 miles or less before the problem started
7) sprayed carb cleaner around manifold gaskets and intake hoses with no vaccum leak detected
8)just tested the wire ohms today and they dont seem right to me they are as follows
#1-12.6
#2-20.7
#3-18.2
#4-22.8
#5-20.4
#6-21.9
seems even worse when they are lined up next to each other like that

is it possible the lifter/valve sticking as mentioned before could be causing the misfire? or possibly the timing is slightly off?(i would assume it wouldnt only effect the #3 or #5 lifter but instead the whole side of the block thats off) but just your opinions would be appriciated

the engine is throwing NO CODES, no MIL or key dance codes as far as the car is concerned nothing is wrong besides the rare cruise light flash.

i feel my next course of action will likely be new wires depending if they are good or not, then, if nothing else look into compression/vacuum test, and getting the car plugged into a scan tool.

only good thing from all this everything i have replaced so far needed it
more things done without any effect,

got the wire/coils still nothing....
did the intake gaskets, added a new PCV valve, did a few other things while down their an still nothing...
got new cam and crank from the dealership and man was i glad i spent that $140 for nothing...
also redid the timing belt with no change...

the only thing that has made the slightest difference is the crank sensor helped while above 2k but the miss is still very prominent.

idk what to do now im kinda out of ideas any help would be really appreciated... and before someone says injectors, idk how on earth that would cause the cruise light to flash

Last edited by Ruggels; 08-24-2012 at 04:09 AM.
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post #23 of 96 (permalink) Old 08-24-2012, 10:29 AM
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Have you done a compression check?
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post #24 of 96 (permalink) Old 08-24-2012, 10:27 PM Thread Starter
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i have yet to do a compression test half cuz im scared to see, half because i didnt think that that could cause my cruise light to flash, but seeing as im out of ideas that seems to be next... if it does end up being compression issue then am i looking at a rebuild?
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post #25 of 96 (permalink) Old 08-25-2012, 01:23 AM
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Yes, you'd be looking at a rebuild.

As for your blinking light - check the pins in the connector for the cam sensor... Make sure they are fully seated in the plug, and that the pins are clean on the sensor. Also, make sure that the pins are actually being grabbed tight by the individual connectors in the plug. Is the catch clip intact on that sensor?
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post #26 of 96 (permalink) Old 09-03-2012, 03:08 AM Thread Starter
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ok so compression test reads as follows (the diagram is front to back since i am not 100% sure thats were each wire goes my new ones dont have the little luxury of my old saying on the wire what is what)
(5?)x-165 (6?)x-165
(3?)x-145 (4?)x-155
(1?)x-150 (2?)x-165

the pins on the connecter were tight i didnt want to pull too hard but giving a nice tug wouldnt free any of them..... if i think i know what u mean by the catch clip then no its been broken off, but the plug does not move after you let go of it i watched closely for that after i first broke it off a while ago

any ideas next? id assume the comp is ok since anything ive seen bad is more like under 100's, ive redone the timing 2 times and didnt change it for better or worse but my dad really thinks thats it, what are the chances that it would start and run fine but then come into problem if the timing was slightly off

Last edited by Ruggels; 09-03-2012 at 03:16 AM.
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post #27 of 96 (permalink) Old 09-06-2012, 01:18 AM
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Wow, great results there - but you're right, they don't solve any issues... your compression looks GREAT, and good testing of the plugs....

I'd begin wondering about a bad computer then maybe...
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post #28 of 96 (permalink) Old 09-06-2012, 03:12 AM Thread Starter
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yea i was glad to see good results on compression, the local pick' n' pull had a 50% off everything sale and a saw a few good 3.5s so if i had to get one that woulda been the time.

guess its time to start deciding weather to buy my own scanner or take it too the shop, as a 94 i have a OBD1?, do they make a OBD1/OBD2 scanner? i wouldnt want to buy a OBD1 just to never use it on another car.
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post #29 of 96 (permalink) Old 09-06-2012, 08:42 AM
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It is OBD1.... But I don't know what a scanner is going to get you...

I think it is time to go over the vat with a fine tooth comb... Check every electrical connector - ideally one at a time, then test run. Unplug each one, look at it, plug it back in then try again with the next one. Also, go over each wire harness one at a time, looking for damage...

The only other thing that come to mind is that there is a thread here on the board about how all the engine sensors run on the same 5 volt line, and an intake air temp sensor can make the voltage bad for something else on the line, giving you fits... I can't search right now, but see if you can find it.

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post #30 of 96 (permalink) Old 09-07-2012, 04:09 AM Thread Starter
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i noticed something when i was leaving work today when i put the car in drive, a knocking starts comming from the engine i checked it out a bit and it sounds like its coming from the bottom, itgoes away when i move, and very quite... would a knock cause bad comp? is it possible theirs a dent in the pan making the crank tap it? i didnt have much light since it was late but i plan to check it out more tomorrow...

but when i think back on it i have noticed some weird electrical problems in my car the wipers will sometimes have a mine of their own and just decide to come on and the AC will switch hot to cold in matter of minutes without me touching it, and the computer compleatly not detecting the misfire
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