fuel problem maybe ????

10

Asked by Jan 12, 2015 at 09:56 AM about the 1991 Ford Ranger XLT Extended Cab 4WD SB

Question type: Maintenance & Repair

i have a 91 ford ranger 2.9 that has very high fuel increase it wont take fuel at full throttle  the engine keeps stalling expecially when going down hill and it just sounds like you cut the key off on it ive changed multiple sensors includiing the tps,timing, pressure regulator, relays ive even changed the fuel pump itself and still cant find the problem all spark plugs wires distributor cap and rotary button are brand new as well also hooked to a computer and was unable to read i do have a check engine light on

12 Answers

7,885

how was it unable to read if u have a check eng light on

10

we connected it and it read as non responsive

7,885

is there fuel pressure aand has the carb been rebuilt which it probably will need to be is the float valve free in the carb it might be stuck causing it to flood

10

it reads 34 idle and 35 running when its cold it wont start unless u spray fuel directly into the injectors

1 of 1 people found this helpful.
7,885

so it fuel injected are your injectors new

10

it doesnt have carb. engine its a fuel injection engine

10

no the injectors are as old as the car

235

Two different areas for you to check here, all common to the Ranger 2.9 engine. First, with it idling, remove the vachum hose off fuel regulator, and see if fuel is gushing out of the connection where the hose goes. A bad regulator will allow fuel to enter the vachum hose, and flood the engine and make it hard to start and stall a lot. Also, next area will be to check for a code for intermittent reference pulse, meaning the profile pickup in the distributor is failing. Sometimes a pip signal error, and either one could be the thick film ignition module on distributor, or the mag pickup.

The regulator and distributor are brand new on the vehicle replaced ignition module still didn't help

235

Ok, when the distributor was replaced, it has to be timed properly, what I mean is when engine is on tdc ready to fire cylinder one, the distributor must point to cylinder one. There is a special cut in the tone wheel in there, at number one that signals injectors. In the old days a distributor could be installed with pointer at any cylinder, and we could just switch the wires. If its out of position, the injectors may be spraying either a cylinder early or late, which will cause rich running, and stalling, and often hard starting. If those are covered, then watching fuel pressure that it holds when key is turned off. If it doesn't, could be a leaking injector. Next would be checking the coolant temp sensor. Ive seen these bad yet not set a code.

235

Also....brain fart....yours likely has the MAP sensor, a sensor measuring manifold vachum to base fueling off of. They are tricky to test, using a digital ohm meter with rpm function. Easiest to just replace it. Check that the vachum hose is connected and in good shape. When you replace it, pull the battery cable for 10 minutes or so to force the computer to relearn.

235

In 1990 some went to mass air flow meters, and some didn't, so you will either have a map sensor or mass air meter.

Your Answer

Add photo

Related Questions

  • fuel problem maybe ???? 12 answers

    i have a 91 ford ranger 2.9 that has very high fuel increase it wont take fuel at full throttle the engine keeps stalling expecially when going down hill and it just sounds like you cut the key off o...

    1991 Ford Ranger XLT Extended Cab 4WD SB

    -

    Maintenance & Repair

  • my1990 ford ranger fuel pump problem 2 answers

    my fuel pump keeps pumping when the trucks off and the sensor keeps clicking ?

    1990 Ford Ranger

    -

    Maintenance & Repair

  • Fuel pressure problem after running a while 9 answers

    With a gauge on the fuel rail the pressure checks OK.40# with just key on and 35# running sitting in the driveway. It goes up when you take the vacuum line off and it also hold pressure well when tur...

    1987 Ford Ranger

    -

    Maintenance & Repair

  • 1988 Ford Ranger fuel problem 2.9 5-speed 9 answers

    It will always start up fine. I will drive a mile to 2 miles down the road then it will start to bog down if i push more down on the gas after a few seconds it will take off again. I have replaced the...

    1988 Ford Ranger

    -

    Maintenance & Repair

  • Fuel 6 answers

    OK I'm having a problem getting my truck to start it died on my a couple days ago and would fire back up fuel pump is good I replaced the fuel filter and the pressure regulator and still will not f...

    1992 Ford Ranger XLT Standard Cab LB

    -

    Maintenance & Repair

Ranger

Looking for a Used Ranger in your area?

CarGurus has 5,599 nationwide Ranger listings starting at $1,200.

ZIP:

Search Ford Ranger Questions

Ford Ranger Experts

#1 tennisshoes
tennisshoes
Reputation 1,300
#2 Tracy Hooks
Tracy Hooks
Reputation 820
#3 Bob Beaman
Bob Beaman
Reputation 770
View All

Related Models For Sale

Used Ford F-150
2,181 Great Deals out of 194,801 listings starting at $290
Used Chevrolet S-10
7 Great Deals out of 1,323 listings starting at $1,999
Used Dodge Dakota
124 Great Deals out of 3,817 listings starting at $1,500
Used Jeep Wrangler
271 Great Deals out of 15,924 listings starting at $2,695
Used GMC Sierra 1500
805 Great Deals out of 68,894 listings starting at $1,800
Used Ford Mustang
737 Great Deals out of 44,990 listings starting at $1,500
Used Ford Explorer
919 Great Deals out of 65,068 listings starting at $799

Used Cars For Sale

2011 Ford Ranger For Sale
25 Great Deals out of 845 listings starting at $4,600
2010 Ford Ranger For Sale
20 Great Deals out of 455 listings starting at $2,595
2009 Ford Ranger For Sale
15 Great Deals out of 352 listings starting at $3,500
2008 Ford Ranger For Sale
27 Great Deals out of 425 listings starting at $3,499
2007 Ford Ranger For Sale
13 Great Deals out of 305 listings starting at $3,395

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.