88 plymouth voyager low power?

Question

I have a 88 plymouth voyager 3.0 v6 seems run and drive fine but it has no power up and it uses a lot of fuel the plugs are loaded with soot getting some black smoke running very rich also the engine has multi point fuel injection. anyone have any ideas were to look for the troubl

Answer 1

From what you've described, my best guess would be a catalytic converter. Take the vehicle to your local trusted independent mechanic, or dealership service center to have it diagnosed properly.

They should be able to test the back pressure and tell you if the converter is plugged or not. If it isn't, then they should be able to tell you what is causing it. Make sure to call in advance and make sure they can test the back pressure, if they can't, find a shop with the right tools to be able to do so (a shop that can't isn't worth going to).

If they tell you it needs a converter, get the price from them and ask what the warranty is. You can then call around to an exhaust shop or two and get a price from them to make sure they're in line with other shops.

BTW, Have never heard of having every sensor replaced at 100k miles. Sounds like something either a sevice manager, or district rep made up to get service writers to push more sales (in other words, sound like a bunch of hogwash). Replace sensors when they go bad, replacing before they go bad is throwing money away.

Answer 2

There is a lot of things that can cause this problem. Jump timing, O2 sensor not switching properly, temp. sensor bad, ( not the one that runs the dash temp. reading, but the one that tells the engine controller). restricted catalytic converter. You need to have a scanner plugged into the data link and check all the sensors to see if one is not functioning right. If they are, check the converter. Chrysler tells us (and I'm not making this up) that when their vehicles are 10 years old or has reached 100,000 miles that all sensors should be replaced. And in a way this makes sense.

Answer 3

i worked for a transportation company which used the caravans and thevoyager. look at the engine see where it was built and that should explain why it is sluggish. these engines are small and thjey are pushing a pretty heavy load. we switched to ford and chevys without the riceburner engine.