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

7,365

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

10

we connected it and it read as non responsive

7,365

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 out of 1 people think this is helpful.
7,365

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

  • 97 Ford Ranger No Start Problem. 1 answer

    My Ford Ranger is not starting. It started up the other day no problem, then when I got to my work parking lot the engine died. I tried starting it up again immediately and it would only crank and...

    1997 Ford Ranger XLT Extended Cab SB

    -

    Maintenance & Repair

  • My Ranger will start and run for about 15 minutes then dies and it smells like it flooded, , 1 answer

    The autoparts store test the TFI module and said it was good, but I ran out of thermal compound when I put it back on, would this maybe cause it to die and not start. seems after a few hours it star...

    1990 Ford Ranger

    -

    Maintenance & Repair

  • 94 ranger no third gear 4 answers

    had a bad fuel pump and sat for 3 months. got it started and took off down the road, 1st, and 2nd fine then shifted smoothly into third and no power. I didn't try 4th or 5th though. Could be lack of t...

    1994 Ford Ranger XL Standard Cab SB

    -

    Maintenance & Repair

  • Mechanical- Cylinder #5 quit firing 4 answers

    Loss power in very hot weather, stopped at Autozone for PC diagnostics. "An ASE certified Master Technician has seen this problem on your type of vehicle before and has performed the following repair ...

    1999 Ford Ranger XLT Extended Cab SB

    -

    Maintenance & Repair

  • fuel system 8 answers

    If anybody is put a 302 in a Ford Ranger what is the best way to run fuel injection and how do you do it without a computer module and if not I'll just run carb

    1984 Ford Ranger XLS Standard Cab LB

    -

    General

Ranger

Looking for a Used Ranger in your area?

CarGurus has 6,246 nationwide Ranger listings starting at $1,300.

ZIP:

Search Ford Ranger Questions

Ford Ranger Experts

#1 FordNut
FordNut
Reputation 1,470
#2 tennisshoes
tennisshoes
Reputation 1,210
#3 Tracy Hooks
Tracy Hooks
Reputation 780
View All

Related Models For Sale

Used Ford F-150
2,440 Great Deals out of 210,728 listings starting at $895
Used Chevrolet S-10
4 Great Deals out of 1,426 listings starting at $1,995
Used Dodge Dakota
104 Great Deals out of 3,905 listings starting at $1,500
Used Ford Mustang
336 Great Deals out of 45,809 listings starting at $2,000
Used Jeep Wrangler
283 Great Deals out of 19,084 listings starting at $3,295
Used GMC Sierra 1500
873 Great Deals out of 64,532 listings starting at $1,500
Used Ford Explorer
725 Great Deals out of 74,778 listings starting at $750

Used Cars For Sale

2011 Ford Ranger For Sale
34 Great Deals out of 1,081 listings starting at $4,200
2010 Ford Ranger For Sale
16 Great Deals out of 466 listings starting at $3,799
2009 Ford Ranger For Sale
27 Great Deals out of 384 listings starting at $2,995
2008 Ford Ranger For Sale
16 Great Deals out of 494 listings starting at $2,900
2007 Ford Ranger For Sale
19 Great Deals out of 339 listings starting at $3,195