Question about 1991 Plymouth Laser

1 Answer

Laser Kh 1.8 91 - high idle, missing under load under 2500rpm

My car is a ford laser kh 1.8 1991, 5 speed manual.
It started off idling high once warmed up, but would then drop back after a few moments/minutes. Now, its constant once warmed up.
It 'seems' that once warmed up it also almost stalls due to missing, if say, i'm tryign to take off (under 2500rpm), but runs normally once its up past this rpm.
I took it to the garage and had new fuel filter, new spark plugs and a 'rocker cover seal' (for an oil leak) put in.... however this did not help, and they suggested an auto electrician.
There is also one unattached wire that is red and black, comming from the fuse box bit, to the right of the engine, near where the cable goes to the distributor cap. could be anything eh? can't see where it could have gone though.
Finally, the car, once heated up, if left for a minute or two, will not start. 3 goes later, it feels like its running on 2 pistons, and blows a LOT of smoke - reving it high helps to make an embarressing get-away.
Any help is appreciated, truly.

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers

I would check ecu i had same problem open it up its behind the dash and look at the 3 big capictors im bettin ones leakin

Posted on Mar 24, 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

The hold light indicator in Ford Laser MZ 323 keeps flashing every time I start the engine. The car jumps when the gear is at D and/or R position.

See this link

hold light indicator in Ford Laser MZ 323 flashing Google Search

and in this link

Fordlaser com View topic Ford Laser Hold Light

it says

the KF/KH auto's have a HOLD light in the cluster when Hold mode is selected.

Just looked in my TX3 manual, and it says if the HOLD light flashes, there's an electrical fault with the transmission. Check for and loose plugs etc.

That follows with the jerky selection.

Jul 09, 2018 | Ford Cars & Trucks

1 Answer

Trying to set the ignition timing on a 1991 KH Laser 1.8 SOHC Engine. The manual says to short Diagnostic Connector TEN with GND then set timing to 5 degrees. Does that sound right.

Try just moving the distributor to obtain an idle speed of 900 rpms. just don't over advance the timing or kick back at the starter and pre ignition knock will occur . don't jump any diagnostic wire .

May 29, 2017 | Cars & Trucks

2 Answers

How do you change a timing belt in a ford laser kh 1992 model car?

so fortunately for you the ford laser and the mazda 323 are one in the same. i would refer to this video to see if you can get a full walkthrough of how the process works. below are two links the first is the video the second is a google search with multiple links may be helpful to you as well.
Water Pump Timing Belt Replacement Mazda 323 Google

Nov 04, 2015 | Ford Laser Cars & Trucks

1 Answer

94 kh ford laser has no spark, I changed the coil, still no spark

check high tension cable for it's resistance, if found faulty, replace.

Sep 22, 2012 | Ford Laser Cars & Trucks

1 Answer

Where can I get a wiring diagram for a 1992 Ford laser KH 1.6lt

It seems the Ford Laser is the same vehicle as the Mazda 323. You can get a manual online here for $15:

May 27, 2012 | Ford Laser Cars & Trucks

1 Answer

Hi there, I have a kh ford laser 93 model 1.6... when i drive the car it seems to overheat but there is water in the radiator and happens on hot days what do you think problem would be. thanks

I assume motor tune or other mechanical condition is not causing the problem.
When engine running, ensure no engine combustion gas bubbles in coolant resevoir (if so, the head gasket is blown).
I suggest you go through this checklist:-
Check radiator cooling fans are operating ok (as required when car warms up) - if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check/replace the thermostat, Check for collapsing (soft) coolant hose on suction side of waterpump when engine revs above idle.
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary,
Check radiator cooling core is not blocked internally or externally.

Oct 09, 2009 | 2006 Ford Laser

2 Answers

Need Valve clearance for '93 kh ford laser

0.10 - 0.15mm inlet
0.18 - 0.23mm exhaust
but you must be carefull because the top of the valve seat becomes concave from wear, a feeler guage will not give the most accurate reading, hope i have been of some hel

May 14, 2009 | 2006 Ford Laser

1 Answer

Extremely high idle speeds develped overnight

check idle speed control make your throttle valves not stuck.check for vacuum leak around the throttle body area look for broke gasket.

Apr 13, 2009 | 1987 Ford Ranger

1 Answer

Horn wiring on kh laser

It could be that the horn needs to be replaced or a fuse or a relay not working also check the horn button on steering wheel, but start with the fuse first then check the horn by wireing it directly to battery [this willbe noisey]

Mar 01, 2009 | 2006 Ford Laser

1 Answer

Water leaking into KH laser Hatchback

It could be coming in through the rear door as the rubber might not be sealing properly the easiest way to find the leak is to remove your seats and carpet sit inside get someone to squirt the car round the doors and windscreen air vents.

Feb 25, 2009 | 2006 Ford Laser

Not finding what you are looking for?
1991 Plymouth Laser Logo

682 people viewed this question

Ask a Question

Usually answered in minutes!

Top Plymouth Experts


Level 3 Expert

85216 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

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

Answer questions

Manuals & User Guides