Question about 1989 Plymouth Horizon America

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I have an '89 Plymouth Horizon that until a week ago was running great - it now has a rough idle at 900 rpm & at 45 mph it really gets bad - I recently installed a valve cover gasket & that's when these problems started - I hope I didn't knock something out of kilter...the spark plugs are gapped right(.035) & the vacuum hoses appear to be OK...regards,Henry M.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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chiquititas
  • 1010 Answers

SOURCE: 1990 Plymouth Horizon America troublre

The speedometer went out at 50,000 miles. The head gasket blew at 125,000 miles. I bought this car new when I started college, and it was the best front-wheel drive car I ever owned. The speedometer went at about 50,000 miles. I traced it to the printed circuit board, but Chrysler didn't carry the part, so I guessed my speed based on what gear I was in and my tachometer reading.

Posted on May 14, 2008

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emissionwiz
  • 76630 Answers

SOURCE: 1989 Plymouth Horizon Fan

About 30

Posted on Oct 20, 2008

tommyboinow
  • 324 Answers

SOURCE: 1998 Plymouth Voyager

lol, they mean the mass ir flow sensor.....

got buy a bottle of maf cleaner at the parts store, the mass air flow sensor is the big block attached to the air cleaner tubing, ussually in the middle. undo the hoses form the maf, and spray the indise of it with it standing vertically, let it dry for 30 mins then put it back on the car.

Posted on Nov 26, 2008

RALilja
  • 384 Answers

SOURCE: colt idle problem.

Most likely you have a bad Idle motor which is a small motor mounted on the intake manifold. If the motor can run better with your foot on the gas but dies if removed then it is probably this. This motor is controlled by the OBDII computer which gets it's control signal from the temp sensor which is located either on the radiator or engine block (which could also be bad), if the electric fan (if equipped) turns on then this is not the problem part, but the idle motor is. Another possibility is that you have some bad /cracked vacuum hoses which should be checked for first, before replacing the idle motor.

Posted on Nov 30, 2008

SOURCE: I have a 1998 Plymouth

Hi my name is Allen!

When the check engine light is on this means there is a problem somewhere in the powertrain control system, which could be almost anything.

Here is what I need you to do, drive your vehicle to AutoZone or another auto parts store near you and have them pull the codes for you. Then get back to me and let me know what those codes are, and what the scanner say the code means.

We will move further with repair procedure after I know what the code or codes are.

Waiting for your reply!

Posted on Jan 01, 2009

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