Question about 1989 Ford Bronco

1 Answer

1989 Bronco runs rich. I've replaced Map sensor, TPS, IAT sensor, O2 sensor, and spark plugs but no solution. I can't find any vacuum leaks. Spraying ether around hoses doesn't change the rpms.

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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,702 Answers

Check that there is no fuel in the vacuum hose that is going to the fuel pressure regulator, if there is fuel in the vacuum hose replace the regulator.

Posted on Mar 17, 2011

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:

1 Answer

After startup up engine seems to fire incorrectly...this lasts about 5 minutes then clears up n runs normal...ecm codes 173, 556...replaced parts n still doing


the 173 is a transmission code, the 556 is a bad brake booster pressure sensor.
a vacuum leak from the booster can cause engine to run poorly.

Apr 20, 2013 | 1994 Ford Bronco

1 Answer

Code 0172 on plymouth breeze


If you've had your waterpump changed along with your timming belt them they did not line it all up correctly and now you have a bent valve.

Jul 22, 2012 | 1999 Plymouth Breeze

1 Answer

Runs poorly(very Rich, stumbles) when map sensor is plugged in, but runs smoother with it unplugged...new map sensor, EGR, TPS, O2, Fuel Pump, timing is right, good vacuum at map, no vacuum leaks,


If it is fuel injected you may have a bad fuel pressure regulator. The regulator is attached to intake manifold with a vacuum hose and the bladder sometimes fails causing gas to be dumped directly into the intake manifold. Only solution is to replace the fuel pressure regulator.

Dec 10, 2010 | 1994 Chevrolet Suburban

1 Answer

My car keeps hesitating.....shakes terribly...cuts off but cranks right bak up...my check engine light comes on sometimes n the codes r p0507 n I 4got the other....I replaces o2 sensor tps fuel regulator...


Try replacing the Mass Air Flow sensor ,OR The MAP sensor. (Manifold Absolute Pressure) Check to make sure there's no vacuum leak anywhere on the engine. Even a small leak can completely screw up how an engine runs.

Nov 04, 2010 | 1997 Chevrolet Cavalier

1 Answer

94 camry. 2.2 fed emissions. Rough idle. runs great any rpm off idle. have checked timing. vacuum leaks, plugs, spark, removed throttle body and iac and cleaned. removed egr. plugged intake. all with no...


Before we both knock ourselves out with fuel injector testing. Hook up a Digital voltmeter (DVM) to upstream O2 sensor and lets see how she is burning. Remember positive lead of DVM to signal wire and negative lead to ground. Anything above 550 mV is rich anything below 350mV is lean. Be mindful that an exhaust leak the size of a pin hole in this region can cause a rough idle. A healthy reading should bounce between 550mV and 350 mV.
Next to test is O2 is working block off air in take making mixture rich and see what O2 says about it . Then pull off a vacuum hose (a lean condition) and see if DVM drops to 200to 300mV's.
Keep me posted.

May 10, 2010 | 1994 Toyota Camry

1 Answer

1989 Deville 4.5 TBI No start condition. I need a step by step Cadillac, or GM diagnostic procedure to double check what I have done. I have replaced: 4 of eight spark plugs that were fowled replaced...


A faulty map sensor will make it run rich and so will a bad or misadjusted TPS but it should try to crank. Check mat sensor. A stopped up converter will do this to.

Apr 26, 2009 | 1989 Cadillac Sedan DeVille

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

Related Topics:

424 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76132 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5520 Answers

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

Answer questions

Manuals & User Guides

Loading...