Question about 1981 Ford Bronco

1 Answer

460 no power now

78 460 ran good had it painted an won't run over 20 mph. engine backfires thru carb and valves rattle.

Posted by on

Ad

1 Answer

  • 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.

  • Master
  • 811 Answers

Check timing, could have been driven without your knowledge 

Posted on Oct 04, 2009

Ad

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

My 85 f250 460 engine with holly carb starts up then engine races way to high


In 85 Ford used a carb spacer that also had the EGR attached.
2340515603_eefbe3f99a_z.jpg
It could be that the gasket has broken and it has a large vacuum leak. Also the EGR could be stuck open. Look for other vacuum leaks like the PCV and brake booster vacuum systems. A 460 engine will run with huge vacuum leaks especially when the choke is on but the extra air will lean out the mixture and could cause damage.
Enclosed is a video about setting idle on a Holley carb which you may not need but others looking at this post may like to see.

Jan 31, 2015 | Cars & Trucks

1 Answer

78 mark V 460 : humming noise at acceleration and between a range of rpm


Exhaust touching under somewhere when engine torque increased, Egr tube, or anti-backfire valve at rear of engine etc. Other possibilities, Motor mount (especially opposite side) , transmission mount. Have you tried brake torque to see how much engine shifts? Once your up to higher speeds, less torque required to push that Big thing down the road. ha ha.
What type of noise is it, if you can describe? Have U-joints been checked?

Apr 05, 2012 | Lincoln Cars & Trucks

1 Answer

Hello when i crank my truck up it will sputter then while i'm driving at speeds of 20 to 35 mph it starts to backfire with a little lose of power. after i've put 3 different carbs , figuring that was the...


Backfiring is a timing problem. It happens when one of the cylinders fires while one of the valves is still open. Your timing should advance as the rpm's increase. Carburated vehicle have what's called vaccum advance and if that vaccum advance line is disconnected it will cause what you describe. There should be a vaccum line that connects from the carb to the distributor that controls your vaccum advance. The sputtering at idle is also probably a symptom of a disconnected vaccum line.

Dec 29, 2010 | Chevrolet Silverado Cars & Trucks

1 Answer

Have to Pump accelerator repeatedly to start after sitting


Check the choke, with cold engine open throttle all the way and let go, butterfly on top should be open about1/4", also I would check your accelerater pump diaphragm sit in the carb. look in carb. pump throttle and see if you see gas spray, if you do pump diaphragm is good, if none bad diaphragm

May 27, 2010 | 1987 Ford F 250

2 Answers

Ford 460 loses power then dies. Starts back up. Idles fine.


It sounds like you might have a clogged catalatic converter on the exhaust system.

Apr 23, 2010 | 1999 Ford Super Duty F 450

1 Answer

My 84 f350 is having fuel and air problem. It ran fair but it would backfire when i let off the accelator,so I had the carb rebuilt that made the backfiring worse. So now I have replaced the carb mounting...


It seems that you have a vaccuum leak around the intake or carb, Check all hoses for good connections. You can spray carb. and choke cleaner around the intake and carb whole it is running and if the engine rise and lowers. you have a leak

Dec 10, 2009 | Ford F-350 Cars & Trucks

1 Answer

Engine sputters and backfires (no power) until it reaches 20 mph.


check if injector or carb is not over fueling or it could be starving fuel

Aug 08, 2009 | 2001 Chevrolet Silverado 2500HD

2 Answers

Engine miss


I believe that you may just have a bad float in the carburator i had the same problem in a similar truck after i rebuilt the carb and also changed the float it solved the problem.

Jan 26, 2009 | 1986 Ford F 350

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

Related Topics:

137 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

fordexpert

Level 3 Expert

5537 Answers

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

Answer questions

Manuals & User Guides

Loading...