Question about 1988 Land Rover Range Rover

2 Answers

88 grand am cold start issues

On a cold start, whether it has been sitting for a few hours or overnight, after i start her she will run fine for a min or so then the idle goes from smooth to rough, vibes bad, and almost no power you floor it and is steadily but slowly revs up.. if you try to drive the idle drops more but will drive. it acts as a perfectly fine motor with no power i will floor it and she will slowly but steadily accelerate.. it will do this every time consistently for about the first 20 min or so of drive/run time then it will kick back to a nice smooth idle and run just fine.. i am clueless

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 16 Answers

Hi

This is listed under Range Rover and not Jeep Grand Cherokee ? So I take it you are refering to RR County or similar Range Rover.

Firstly I am assuming this a 3.5 V8 EFI flapper type. Some of this will not apply to the 3.9 which is not a flapper type AFM. All HT leads, plugs, dizzy cap filters been checked ect? No water loss, or oil loss ? Good....

Second assumtion you are in the UK or Europe, if you are in the US will need to visit www.rangerovers.net who may know of more local help :)

The trouble with the EFI system it is sensitive, if not correctly set up. Check your throttle cable is not sticky, and then you need a multimeter with millivolts on it and access to a CO2 meter.

You will need to check the Potentiometer, this sits just behind the AIr Flow Meter. With the ignition on but the engine off you can test the meter. You will need to check the CO2 out put too, this is adjustable.

Once you have sorted this you can sort the dizzy and idle speed, it is important to do this the right way round as ECU is very basic, do not forget this the last millenium kit we are talking about.

Idle speed is the mostly cause of this type of problem, other wise we are talking injectors and that is a whole different ball game. You could try a jar of Wynns cleaner ?

The short cut is to use the little thumb wheel on the throttle cable near the bulk head to adjust the idle, this can get knocked if you been doing other stuff. Just turn it when the engine is running being carefull to avoid any contact with HT leads, etc. It amy take a couple of goes, put the idle should be 600 rmp and 1000ish when the choke kicks in.

There are plenty of downloadable pdf fies to help with this
try
http://www.pdfqueen.com/pdf/ra/range-rover-workshop-manual-1983/
or CDs at
http://www.britishpacific.com/BPSite/LandRoverAccessories/LandRoverManuals.html

Posted on Feb 19, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Land Rover Master
  • 752 Answers

Could be ur o2 sensors emissions or catalytic converter clogged

Posted on Feb 06, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My 2003 jeep grand cherokee will start fine after it sits overnight or for a hour or so but won t start if i go to the store and get in it five minutes later. After 1 hour it cranks right up


Sounds like a fuel mixture issue, being a 2003 must be EFI, could be faulty mass air flow sensor, fuel mixtures being to rich when engine is at operating temp.

Jul 05, 2016 | Jeep Cars & Trucks

1 Answer

Odyssey cranks and runs fine until ot gets hot, then it shuts off and will not crack again. Then, after the car sits and cools down for a few hours, it starts again at the first try.


Sounds like a fuel pump with the information you have given me. An Independent garage will be a lot cheaper and more reliable than the Stealership. Good luck

Mar 18, 2014 | Honda Odyssey Cars & Trucks

1 Answer

My 1988 2.3 liter mustang will not start after sitting overnight


Being that this vehicle is a 1988 it is most likely still using an electric choke. When your vehicle is cold (even just not warm enough) it needs a richer fuel/air mixture to start which is what the choke is there for. When you turn the key the choke will automatically shut so the suction from the engine will pull fuel from all circuits of the carb. Anyways.. long story short for some reason it would seem your choke isnt closing as it should. This is generally just a hot wire thats connected to your carb.... maybe a short maybe its stuck open for some reason.. idk but that is where you should focus your attention. Hope this helps.

Dec 27, 2013 | 1988 Ford Mustang

1 Answer

'97 Jeep Grand Cherokee AC "Works and Stops"


Make sure your fan clutch is working. No fan, no cooling of the condenser, no heat dissipation, no cold air. Start the truck and make sure you feel air movement, a lot.

Aug 11, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

My 1994 Jeep Grand Cherokee with the 5.2L is very difficult to start if it has not been run in the previous 6 hours. Replaced ignition coil but didn't solve the problem. After sitting overnight it


Low fuel pressure.
You need to check the fuel pressure on the first crank and watch it as it is running.
Requires a special gauge.
If it were just a starting problem I would say it could be a pump relay, but not if it runs rough for 5 min.
Might be a dirty filter or problem in the tank.

Jun 29, 2012 | 1994 Jeep Grand Cherokee

1 Answer

The diagnostic connector on my 1990 Geo Prizm is dirty. Does this effect anything. It is hard to start when cold or has been sitting for a few hours. When it does start it runs rough for a few minutes...


if it contines to run fine dont mess with however if it starts acting out again sound like possibly loss of fuel pressure have it check next with gauge on fuel system allow it to sit overnight and see what gauge reads in am BEFORE trying to start engine let me know if you need help

Mar 07, 2011 | Geo Prizm Cars & Trucks

1 Answer

Sits overnight or a few hours , wwillnot start without pumping gas pedel many times. runs fine after started.


your cold start went out it is a small injector in the middle of the manifold by the head its there just to help it start cold they go out all the time it just shoots more gas in when it starts

Aug 17, 2009 | 1987 Mercedes-Benz Mercedes Benz 190 Class

1 Answer

Electrical Problem?Runs great then shuts down,let it sit runs fin


Sounds like the ECM is bad. This is a common problem, when the ECM gets hot there is a solder joint that seperates, it makes contact again once it cools down

Jun 17, 2009 | 1998 Plymouth Grand Voyager

1 Answer

88 Toyota Corolla backfires through carburetor.


If that is carbureted, and has a mechanical fuel pump, try running a length of fuel line from inlet side of pump to a gas can that has fresh, clean fuel, and if it runs good that way, you know problem is most likely in the tank. Removing the tank & cleaning it out is best solution from there. I'd even be tempted to add a small bottle or 2 of Lucas Fuel Sytem Cleaner to first fill in clean tank, just to help clean lines as well as carb.

May 20, 2009 | 1994 Toyota Corolla

1 Answer

95 jeep grand cherokee, hard starting, backfires, when cold


get a couple bottles of gas line antifreeze .. if you don't already use it and add it to the gas.

Robert

P.S. in minus 40 i don't even get out of bed... minus 23 here last nite... isn't winter grand

Jan 21, 2009 | 1995 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

168 people viewed this question

Ask a Question

Usually answered in minutes!

Top Land Rover Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75077 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7768 Answers

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

Answer questions

Manuals & User Guides

Loading...