Question about 1993 Plymouth Sundance

1 Answer

I have a 93 Plymouth Sundance that has been running good until just a few days ago. When I now start it up, when stepping on the gas to head down the road, I can hold the pedal to the floor and it will barely get up to 15 mph, struggling to get there. Once it does and I attempt to increase my speed, at about 35 MPH it starts to cut out and almost dies. Someone said my thermostat could be stuck open, or my catalytic converter plugged. Any suggestions please? It was a great work car until this started.

Posted by on

  • Anonymous May 11, 2010

    This sounds like it could be a fuel problem to me - as in starved for. Does it even out when you come off the gas?

  • Dave  C
    Dave C May 11, 2010

    It does sound like a plugged catalytic converter, try taking the O2 sensor out, the reduced restriction ahead of the cat will give you more power if it is plugged but it will be noisy while you do this test.



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Plymouth Master
  • 6,674 Answers

Start with cycling your key, on ,off, on, off, on, leave on (not start)and count if check engine light flashes. For example: flash,flash,pause, then 2 more flashes is code 22. 3 flashes, pause then 3 more, is code 33 etc... Code 55 is end of message. Get back to us if you get any.

Posted on Jun 05, 2009


1 Suggested Answer


6ya staff

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1992 Plymouth sundance 3.0 ltre. Wires are good the feul n pump just repalced and still sometimes will not start or stop when running then restarts after 10 minutes. Interestingly the tachometer only kick...

any time you replace the fuel pump you MUST replace the fuel filter. Sounds like it could be a couple of different things. Pick up coil if it has a distributor. bad coil pack. Replace fuel filter first .Good Luck!!!!

Nov 14, 2010 | 1991 Plymouth Sundance

1 Answer

93 sundance 3.0L replace the valve seals

it is more than just the valve seals.the 3.0l engine is notorius for the valve guides slipping down into the valve pocket. there is a fix that involves adding a keeper to prevent them from falling but it requires removing heades and taking them apart. yours may have already have had this done so valve seals may fix it.
yes you can change without removing heads you need to have piston at the very top off stroke if off by a little the piston will be forced down by the air pressure so somehow locking crankshaft from moving would be a good idea.
remove plug from a cyl and fashion or buy a fitting to screw into plug hole that will also hook up to a air hose from a air compressor. the air pressure holds the valve closed then you will meed a valve spring compressor designed for removing the springs with head still installed. can rent them at auto parts stores.remove spring and replace seal. then reassemble and move on to the next
but sometimes the valve opens or piston moves down and the valve falls into the cylinder. you can pull it back up and try again or just take the heads off.
my recomendation is just take the heads off they are fairly easy to remove and instal. then have machine shop cut the grooves in the guides and install keeper clips

Apr 04, 2010 | 1993 Plymouth Sundance

2 Answers

Where is the fuel filter

To the rear of the gas tank under the car.

Oct 20, 2009 | 1994 Plymouth Sundance

2 Answers

No accel in 89 sundance

sounds like a fuel problem, fuel filter clogged, or low pressure on fuel pump.

Aug 28, 2009 | 1989 Plymouth Sundance

1 Answer

1993 plymouth sundance will turn over but will not start. was driving but it died. sound like it is not getting gas

Hi I am vortash to check if the cylinders are getting fuel just turn the vehicles engine few times then remove a spark plug to see it it is wet if it is not a fuel problem more likely spark failure replace plugs as they can fail under pressure and check for spark ,, may als be a head gasket problem so check compression and see if above 140 0r in the green with each cylinder . hope this helps regards vortash

Jun 30, 2009 | 1993 Plymouth Sundance

1 Answer

No power at take off

Check all your vacum lines and make sure that your plug wires are properly secured this seems like a minor problem

Apr 17, 2009 | 1992 Plymouth Sundance

1 Answer

Intermittant loss of acceleration on my 1991 plymouth sundance

Turn key, on, off, on, off, on & leave it on (not start) & count check engine flashes. 2 digit codes, for example: flash, flash, flash, pause, flash,flash., is code 32

Mar 29, 2009 | 1991 Plymouth Sundance

1 Answer

Sundance leaks gas when it's running

check you r gas lines from tank to motor,fix leak 1st ,if it still idles high let us know

Dec 14, 2008 | 1994 Plymouth Sundance

Not finding what you are looking for?
1993 Plymouth Sundance Logo

196 people viewed this question

Ask a Question

Usually answered in minutes!

Top Plymouth Experts


Level 3 Expert

85206 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a Plymouth Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides