20 Most Recent 1990 Plymouth Sundance Questions & Answers

loose connection on the temp sender unit, broken wire to temp sender unit
low coolant level in the system/ air lock

1990 Plymouth... | Answered on Mar 11, 2017

Try replacing spark plugs and ignition leads!

1990 Plymouth... | Answered on Feb 15, 2015


1990 Plymouth... | Answered on Jan 19, 2014

try a camshaft poss.sensor or timing belt slipped

1990 Plymouth... | Answered on Feb 27, 2013

no back up lights mean back up reverse neutral switch is bad.use a 12 volt test light see if power going to blower motor or remove blower motor hot wire blower motor see if it works if not blower motor need replacing.if blower works when hot wired it.problem could be in ac and heater control switch faulty also resistor or check blower make sure it getting good ground.you could have poor ground at blower motor or electrical wiring going to blower motor could have a short or open.

1990 Plymouth... | Answered on Oct 15, 2012

I think you have a leaking head gasket, this causes the symptoms you have.

1990 Plymouth... | Answered on Oct 03, 2012

2,5 liter engine intake gasket? it is tricky, you should get the haynes total car care book for that car before attempting it, autozone can order it for you.

1990 Plymouth... | Answered on Sep 27, 2012

Please make sure that the trigger required for the coil to give out the High voltage to spark comes from the pulsating voltage at the coil LT( low tension).
So check for the make /break on the coil- on one side you will need the positive and on the other the trigger. Once this is seen then the distribution can be checked, check the HT wires and contacts in the distributor.

1990 Plymouth... | Answered on Jun 21, 2011

The fill plug is on the left side of transaxle look for a black rubber plug pop it out use a suction gun to fill it up

1990 Plymouth... | Answered on Mar 28, 2011

check engine earth body earths earth points

1990 Plymouth... | Answered on Mar 19, 2011

n your trunk pull back the carpet should be eaither on the back by the tailights or up fron more by the wheel wells

1990 Plymouth... | Answered on Jan 11, 2011

To access the blower resistor,carefully pull down the lower right under-dash panel.(Below the glove box) it it will be right next to the blower motor in the heater housing. it has a plastic connector with a few wires running to is, and 2 bolts holding it in the housing. I hope this helps

1990 Plymouth... | Answered on Dec 05, 2010

Try changing your thermostat. This is a valve that controls the coolant going to your engine. It might not let enough coolant to go through to cool down your engine. Most commonly the case. Otherwise you need to flush your coolant system because something is blocking the coolant from passing through your system

1990 Plymouth... | Answered on Nov 16, 2010

Code 51 = Oxygen sensor stuck in lean mixture mode. ( this will often cause engine to run rich due to oxygen sensor telling engine controller that it is running lean, thus send more fuel) This may be caused by M.A.P. sensor as well, so check vacuum lines and clean connections on MAP sensor first. It should be one of 2 things, Fault from MAP sensor, or faulty oxygen sensor.

1990 Plymouth... | Answered on Nov 03, 2010

Thanks. The odometer is driven by plastic gears inside the instrument cluster. Since the speedo works we know the info is getting to the cluster so the plastic gears are obviously stripped or broken. This is pretty common on these vehicles.

You'll need to replace the cluster or have it repaired.

1990 Plymouth... | Answered on Oct 11, 2010

this is because of problem eith the speed do meter itsef. the gear component inside the speedometer may be damages. please try replacing the speedometer itself.

if you feel my answer is useful please vote for me.

1990 Plymouth... | Answered on Jul 10, 2010

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