98 Plymouth Voyager 3.3L, 1. Sometimes without warning signals fail to work at all (all other lights function fine); 2. sometimes all lights on gear selections have circles around them (when normally only one, ex "D" would be circled; 3. All the time, as long as vehicle is under 71 MPH runs great, over 71MPH starts shaking violently, Have been told all is related to computer prolem; computer was replaced about a year ago with a junkyard computer and did fine for awhile. ANY IDEAS on how to fix these gremlins??? THANKS!

Marvin

• 85242 Answers
• Posted on Oct 20, 2008

SOURCE: 98 PLYMOUTH GRAND VOYAGER WONT START - BLOWS ENG FUSE - HELP

You have a shorted engine harness, this is not common but it does happen, heat and engine movement cause damage to the harness, this is most common on hi miler cars and vans, the only way to fix it is to start by looking anywhere the harness rubs, that is where the damage occurs.

SOURCE: 1997 Plymouth Grand Voyager won't start

there is a starter relay in the relay box. check for power going to the relay box , also have your check for voltage going to the starter . check for ing feed at the small wire also . before replacing any more parts , i would think that all off this was done the frist time?

SOURCE: 1991 3.3L Plymouth Voyager, Transmission temp sticks in first.

John, this sounds like a valve hanging up in the valve body. The car shifts when the govenor pressure overcomes throttle valve pressure in this valve body.

What is the condition of the fluid? Is it at all dark or grey, does it smell burnt? It should be a nice light pink. If not, have the fluild and filter for the trans changed. This may take care of the problem.

If the oil is really burnt, you are at the end of the life of the clutches and you are looking at a complete trans rebuild. If the oil is ok, a trans shop should be able to take just the valve body down, clean it and eliminate the problem without overhauling the entire transmission

good luck

SOURCE: my 1992 plymouth grand voyager wont shift out of first

Have the transmission computer scanned for codes. This trans is completely electroniclly shifted.

SOURCE: HELP! Problems on my 1997 Grand Caravan P1698, P0138, P0140

you need to go over your entire wiring harness, under the hood and inside the dash. Start with the ground wire on the battery and work your way inside. It sounds like there is a loose ground wire somewhere