Question about Jeep Cars & Trucks

3 Answers

Jeep back fires and idles lumpy - Jeep Cars & Trucks

Posted by on

Ad

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Jeep Master
  • 5,370 Answers

Click this link below for Jeep backfires:-----http://technoanswers.blogspot.in/2012/02/jeep-backfires.html
----------This will help.Thanks.

Posted on Feb 07, 2012

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Jeep Master
  • 3,640 Answers

There are many causes. first start by changing plugs, wires, if it has a distributor. check the cap for cracks, and rotor button in distributor. then go from there! sounds like a timing problem. also check or clean the IAC ( idle air control) this is what controls idling on todays cars and light trucks. here is another sign for back firing. http://autorepair.about.com/library/faqs/bl266c.htm

Posted on Feb 07, 2012

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Jeep Master
  • 76,118 Answers

This type of problem can be caused by engine wear issues, shorted or cross firing spark plug wires, moisture in distributor, lean fuel mixtures and vacuum leaks. Check all these area's for problems

Posted on Feb 07, 2012

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

76 jeep cherokee 360. how many turns on the oxygen screw of the carburator? i can take off fine if i baby the gas but if i give it too much gas it boggs down and back fires.


Sounds like a problem with the accelerator pump or cruise circuit in the carb. The idle mixture screws only affect the idle circuit.
You start with 2 turns out then adjust it with an exhaust gas analyzer.

Sep 29, 2013 | Jeep Cherokee Cars & Trucks

Tip

Bad fuel economy and lumpy idling - possibly causes


<p><b><u><span>Excessive fuel consumption and 'lumpy' idling engine</span></u></b><br /> <p><b><span>Possible faults:-</span></b><br /> <p><b><u><br /></u></b><br /> <p><b><u><span>Coolant sensor </span></u></b><span><span> </span>- engine is signaled as being 'cold' all the time, not just at start up, causing ECU to set longer injection cycle </span><br /> <p><span><span>&oslash;<span> </span></span></span><span>Low coolant level can prevent sensor being able to detect coolant temperature</span><br /> <p><span><span>&oslash;<span> </span></span></span><span>Faulty 'open' thermostat allows coolant to circulate without regulation and perhaps prevents the engine from achieving normal running temperatures.</span><br /> <p><span> </span><br /> <p><b><u><span>FPR</span></u></b><span> - broken diaphragm allows fuel to enter the vacuum line and then into the inlet manifold. Additional source of fuel makes the fuel air mix richer causing a faster and lumpy idle.</span><br /> <p><span> </span><br /> <p><b><u><span>Vacuum leak </span></u></b><span>- 'high oxygen' signal from O2 sensor causes ECU to set longer injection cycle.</span><br /> <p><span> </span><br /> <p><b><u><span>O2 sensor</span></u></b><span> - 'high oxygen' sensor error causes ECU to set longer fuel injection cycle</span><br /> <p><span> </span><br /> <p><b><u><span>MAF</span></u></b><span> - 'over reads' in error the amount of air entering causing ECU to set longer fuel injection cycle </span><br /> <p><span> </span><br /> <p><b><u><span>IAT</span></u></b><span> - 'under reads' in error the temperature of incoming air causing ECU to set longer fuel injection cycle</span><br /> <p><span> </span><br />

on Jul 22, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

Engine back fires and has gas smell in oil


Sounds like a leaking or stuck open fuel injector might be allowing gas to leak down into the crankcase, thinning the oil.

Feb 27, 2012 | 1993 Jeep Grand Wagoneer

1 Answer

How to fix back fire in my carb 1985 jeep cherokee


several things to check for this one....since its happening under a load.

- timing
- ignition (spark plugs, distributor, cap/rotor)
- Idle controller
- exhaust system

Feb 01, 2012 | 1985 Jeep Cherokee

1 Answer

,battery went flat, car sat for 2 months,idling too fast and lumpy, on start up and doesn't go back to correct idle, revs high when changing gears


Possibly faulty idle air control valve or vacuum leak. Hard to tell without actually looking at the car, but start by looking for vacuum leaks.

Mar 06, 2011 | 1998 Audi Cabriolet

1 Answer

1992 jeep cherokee sport 2 door 4.0 inline six. Jeep was running fine except when you went to start it it took two cranks sometimes three then would start. Went to start it the other day and it took alot...


Sounds more like a timing problem than an O2 Sensor. Distributor out of Sync would be my guess. It ran better at Higher idles because the timing belt/chain was tight from tension at low idle the timing was off which caused your problems. Now the belt is either broken or so loose the timing is out and the vehicle won't fire. If it has a Distributor cap remove it and watch the rotor. If it turns the belt is intact but Timing may still be off.

Dec 27, 2010 | 1992 Jeep Cherokee Limited

1 Answer

V40 direct injection gdi . rich running & lumpy idle


replace lambda probe expensive but it will run ok after that, i dont know if you know how they work so here's a brief: lambda tells ecu how rich the exhaust gasses are, ecu ajusts fuel input as neccasery eg lambda says not anough fuel ecu puts more in and the other way round.
so if your lambda is covered in **** when you get it out just clean and put it back, if it looks clean enough it needs replacing!! jezza

Feb 09, 2010 | 2000 Volvo V40

1 Answer

Back Firing, low idle while in drive, choking and dying


Check your fuel pressure, the regulator is on top right where the fuel lines connect to the fuel rail.

Apr 26, 2009 | 1995 Jeep Grand Cherokee

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

Related Topics:

94 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

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

Answer questions

Manuals & User Guides

Loading...