1989 Dodge Ramcharger that idles rough but still cranks like br..
I have a 1989 Dodge Ramcharger that idles fine at first and then it starts idling rough and has cut off one time going down the road with no hesitation or nothing it just died. I pulled the distributor cap and there was water on the pickup plate but i cleaned the water out and all and it still runs rough. I am thinking it is that cap and pickup plate but could it be anything else and what is the firing order on that thing. It has the 318 FI.
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You have an intake vacuum leak. The vacuum is sucking in water and causing the truck to run rough. It may get better when the truck is hot because this sometimes causes the plastic or gaskets to swell closing up the leak. To confirm ... when it's cold you can start the truck and spray some brake cleaner or quick start around the sides of the intake and you will see the engine will rev up a little.
Hope this helps.
Sounds like a problem I had with my '85 Dodge D150 Ram Prospector. In my case, the automatic choke was broken and it was starved for air during acceleration because the choke was always closed. It ran fine at idle or very slow acceleration. I wired the choke open and it runs much better, although it is much more difficult to start as the fuel mix is lean due to the extra air. Once it gets warmed up, though, it runs fine. I hear that the barrel carb on mine often has problems.
i had the same experience but what i have come to find out on the 89 tbi they usually run best when timed by ear or feel if it idles good and runs fine drive it just at smog time tune it wit a light they get us out here in cali if its off at smog only stations
That could be caused by several things. Is your check engine light on? If it is on it could be due to a number of sensors such as the MAF(mass air flow), MAP(manifold absolute pressure), or EGR(exhaust gas recirculation). However if your check engine light is not on it could be caused by bad plugs and or wires, lack of fuel pressure caused by fauly fuel filter and or fuel pump, or it could be caused by the timing being off a few degree's. Please provide me with the engine size and any work that has been done to that vechile recently to help rule out some of these possibilitys.
I assume you have power brakes and I gather that it idles properly at times, but dies when the brakes are applied. This sound like a leaking power brake assist vacuum line or diaphram. You can verify this by locating the big vacuum hose connecting the intake manifold to the assist diaphram. This will be about an inch in diameter connected to the round item behind the brake master cylinder next to the firewall.
Disconnect the line at the intake manifold end, and plug the vacuum port on the manifold with a tapered rubber stopper or cap.
Being aware that you now do NOT have power assist to the brakes (requiring CONSIDERABLY more pedal pressure to stop!!!), see if the problem goes away. If it does, you have narrowed it down to the assist diaphram or the hose. If it still persists, it is an engine tuning/control issue, not related to brakes.
Do determine whether it is the vacuum hose or the cannister, remove the previously installed cap/plug, reinstall the hose to the intake manifold, disconnect it from the diaphram and plug/cap the hose at that end. Repeat step three... if the problem returns, the hose is leaking and should be replaced... If the problem still goes away, the Power Brake Assist Diaphram Cannister is leaking excessively and should be replaced.
***ALSO*** Any other vacuum lines leaking can lower the manifold vacuum to a threshold level where the load of power brake assist actuation crosses the line for adequate vacuum to idle*** So check all vacuum lines underhood, looking for a pronounced hissing at vacuum leaks. A manifold vacuum gauge is a relatively inexpensive diagnostic tool that could also be useful.
Well, hope this helps, and good luck! Don't forget to rate this answer!