Cars & Trucks Logo

Related Topics:

Anonymous Posted on Jan 15, 2012

Engine wont start it backfires through the carb

Replaced all the plugs, wires cap and rotor, this jeep has been sitting for 4 years I am going to buy a carb rebuild kit and rebuild the carb and go from there, Any suggestions

  • Anonymous Jan 15, 2012

    86 jeep command, after I replaced all the wires and plugs and cap and rotor it started right up and idled nice and as soon as I put it in gear it stalled out and then it went back to the wont start and backfiring again

  • Anonymous Jan 15, 2012

    86 jeep command, after I replaced all the wires and plugs and cap and rotor it started right up and idled nice and as soon as I put it in gear it stalled out and then it went back to the wont start and backfiring again

×

2 Answers

Anonymous

Level 1:

An expert who has achieved level 1.

  • Contributor 1 Answer
  • Posted on Jan 15, 2012
Anonymous
Contributor
Level 1:

An expert who has achieved level 1.

Joined: Feb 16, 2008
Answers
1
Questions
3
Helped
509
Points
0

What year,motor&did u check timing and check to see if valves are stuck open

montehammons

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.

  • Cars & Trucks Master 5,531 Answers
  • Posted on Jan 15, 2012
montehammons
Cars & Trucks Master
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.

Joined: Sep 14, 2011
Answers
5531
Questions
2
Helped
1645027
Points
17401

Make sure the timing is correct. Backfiring is often caused by an engine out of time.
Good idea on the carb rebuild. It may be letting too much gas in.

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

0helpful
1answer

1970 mustang won't start and backfires when gas poured in carb

Which engine?

What's the history?... unknown, was running just before tune up and now it doesn't, first start in 15 years,, other?

Backfire would imply timing and or stuck valve(s). The different Ford V8s have different firing orders. Be sure you have identified the specific engine and are referring to the correct diagram.

You can try retarding or advancing the timing a few degrees by turning the distributor.

You may not have properly located cylinder 1 on the distributor cap. You need to find compression stroke of cylinder 1 and bar over engine to TDC. Then remove distributor cap. The distributor rotor will point directly at distributor cap cylinder 1 plug wire tower.

If it's an old engine or has sat for years you will need to do a compression test of all cylinders.

Comment for further assistance.
0helpful
1answer

Engine won't start. Getting no spark.

Have you check to see if the timing on the car is right?
0helpful
1answer

I own a 1990 YJ Jeep 4.2 If I drive the Jeep every day it starts and runs great. If the car sits for several days it is extermly hard to start If I use a small amount of starting fluid, it will fire...

Sounds like the fuel pressure regulator. Its not holding the pressure over a period of time. Making it difficult to start after its been sitting.
0helpful
1answer

1996 gmc jimmy wont start seems like advanced timing issue backfiring out throttlebody, replaced timing pick up, distribitor cap, crank sensor, ICM, when ignition conrol module replace the engine ran fine...

You said the problem happened right after the engine was replaced correct? If so bring number cylinder to top dead center on the compression stroke. Remove the distributor cap and see if the rotor is lined up with the number one spark plug wire. It's possible the distributor was installed 180 degrees out.
2helpful
1answer

95 jeep cherokee wont start

You will need to narrow down your possibilities...do you have spark? do you have fuel going into the engine? Since you mentioned a storm, I'd look at spark first, checking the condition of the ignition wires cap and rotor. Wires should be dry, cap and rotor should not have any carbon tracks between any of the internal contacts and should be dry as well. Check for spark at the plug end of any wire and if none is present, check again at the wire from the coil to the cap at the cap end.
If the engine starts when carb cleaner is sprayed into the throttle body then the problem is on the fuel side, requiring diagnosis in that system.
Most common failures are crank position sensor and fuel pump but before going there, get a manual such as Haynes or Chilton and do tests outlined. Most parts are expensive and difficult to get at...you only want to replace what has failed.
0helpful
1answer

Changed rotor,cap,wires&plugs now theSOB wont start and backfire

My 99 v8 gas ran fine before it went for a barge ride to alaska. weeks later it acted like timing was off, kick back when cranking etc. Corrosion had build up in cap and rotor from the salt air. First cleaned contacts and was much better, ordered and replaced cap and rotor, problem solved.
0helpful
1answer

Have no power on acceleration, backfires 4.0L Jeep

could it be your throttle sensor? If it is a carbureted engine, check the accelerator pump inside the carb.
0helpful
1answer

1988 cherokee laredo 5.2. Replaced Cam Sensor,

take off your distributor cap and turn the engine over, does the rotor spin around? if not might be your timing belt! and if it does spin it still could have jumped a tooth on your timing belt? can you poor a little gas down the carb ? will it try to start? if it does but backfires then your timing belt may have jumped a gear or two...
0helpful
1answer

1993 jimmy wont start

you are off the timing by a tooth or two. when you replaced the cap and rotor, if you did not mark the position of the rotor with some point on the motor or firewall, then it is likely that you installed the rotor by a couple of degrees. so, when you are going up hill, and the engine needs to advance the timing to add power you timing is off even more causing lack of power and sputtering and backfiring.
1helpful
2answers

No spark, just put in a new coil, distrbutor isnt dirty or wet, sombody told to check out the littl box's on the fender well, what are these to box's and what is there purpose? Mike 77 cj-5 304 3spd I...

I had the same problem with my 85 cj7 this week, I relpaced the ignition control module, plugs, wires, cap, rotor and the the coil; still had no fire to plugs. the problem turned out to be my distributor, replaced it today and she fired right up. Most likely it was the pick up module in the distributor that went bad.
Not finding what you are looking for?

519 views

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

john h

Level 3 Expert

29494 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

7339 Answers

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

Answer questions

Manuals & User Guides

Loading...