1994 1500 318 - Rough Idle, part-throttle hesitation - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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#1 Old 09-16-2009, 07:30 PM
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1994 1500 318 - Rough Idle, part-throttle hesitation

Ok guys and gals, got some things stumping me with my new (to me) Ram... 318 with 188k is having some issues with idle, rpm's drop slowly while sitting at stop light, etc, throw it in neutral, and engine revs to 1500, then drop to normal and starts to fall again... drop in drive, revs up, then drops... so on and so on... if i let it go, it will die, but start right back up...

Problem #2 - at part throttle, while accelerating, engine will miss and "knock" but works fine at wot...

That said, these problems are not always there... some days, runs fine all day...

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#2 Old 09-18-2009, 07:11 PM
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Ok, I'm new to posting on the forum, maybe i'm in the wrong department here? with all of the other solutions i have found over the years, i'm sure someone, somewhere has had a similar issue??
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#3 Old 09-24-2009, 10:39 PM
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Check your IAC (idle air control) valve. Try this link bro.


Lemme know if it doesnt work
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#4 Old 09-25-2009, 08:25 PM
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or vacuum leak

1999 Dodge Ram 1500 4x2 5.2L NV3500 Club Cab
in: sct by hemifever
-Upgrades waiting on their lazy owner to install: russell stainless lines, hawk ceramic pads, rotor, calipers, energy suspension master kit, derale 4000cfm dual fan kit, moog upper/lower ball joints

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#5 Old 09-25-2009, 11:58 PM
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Sounds exacly like the O2 sensor...

94 SLT 1500 318 Flat Black 2wd

Mods: M1 / Comp Cams / 4.10 / 20" 3rd Gen Rims / 4/6 Drop / Flow Master 40's / All New Skins /

2010 Sport Crew Cab Black 4x4 5.7 3.92 Sport hood 10 Speaker Alpine w/nav

Mods: Diablo 91 Canned Tune / Billet Tech Oil Catch Can / Vararam Intake / Magnaflow Muffler / All Interior|Exterior Bulbs LED White / Recon Smoked 3rd Brake Light / Recon LED Light Bar / Orange Striping / Lockpick / Debaged|Murdered / 2 12" Foxbox / 2 Alpine SWR-12D4 Subs / NVX JAD1200.1 1200w amp / Flat Black VIP Wheels VP2 / Black & Orange Leather / Orange Interior Accents with Gloss Black /

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#6 Old 09-26-2009, 12:45 AM
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Could also be a Throttle Positioning sensor. Could be plugged injectors, fouled plugs, spark plug wiring or rotor and cap going bad. It's one of those problems that can be caused by many things. The fact that it doesn't do it all the time simply means that the PCM is making adjustments to keep the engine running. Or you could have a gremlin just messing with ya.
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#7 Old 09-28-2009, 12:21 AM
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My thoughts-
Mass air flow sensor or dirty air filter.
Or the EGR valve is stuck.
I have the same year truck and engine.
Good Luck!

1994 Ram 1500 SLT
5.2 W/4sp auto 46RH & 3.92 Suregrip
Black on Black no decals
Mopar Perf. PCM w\K&N Air Filter
Fabtech 3-1/2" Lift Spindles
99 Sport frt. bumper & grill
258000 miles and still smoking chevys every chance I get...and Toyotas too.

1996 B-2500
5.2 W/4sp auto 46RE & 3.52 gears
Starcraft Custom
Maroon 7 pass.

142000 miles going strong
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#8 Old 10-03-2009, 01:20 PM
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cartmania,I had the same problems your having,I changed the plugs then cleaned the iac.that didn't cure it,went under and unplugged the down stream o2 sensor in the cat.she runs great now but the cel is still on,will replace the o2 when I get a few bucks.just a thought you may try.hope it helps.
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#9 Old 10-22-2009, 07:30 PM
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i had the same problem in my 98 360 it was the downstream O2 sensor
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