Power loss when accelerating

Asked by Jul 23, 2016 at 06:30 PM about the 1996 Ford E-150 XL Econoline

Question type: Maintenance & Repair

I have a 1996 Ford E 150 van. Already installed fuel filter, Plugs and plug
wires. When I step on the gas as in driving up a hill on the interstate it loses
power dropping speed down as mush as 20 to 30 mph. Is there an air fuel
modulator ? If so where? The Ford dealer that installed the fuel filter and
plug wires said they would have to run a second diagnostic {with additional
charge} to maybe come up with another reason for the problem.  I am not
willing to do that at this time so any suggestions and fixes would be
appreciated.

9 Answers

17,620

Check your transmission fluid level. If low and on a hill fluid may not be getting to filter.

1 out of 1 people think this is helpful.
10

There can be multiple reasons for this. If this only occurs when you want to accelerate rapidly, then you may want to check Timing Setting/Firing Order and Fuel Injectors. You've already fixed possibly issues with fuel supply to the injectors and firing mechanism by replacing Fuel Pump and Plugs.

1 out of 1 people think this is helpful.

Thank you Firebird will check that in am. and Offhook we replaced the fuel filter not the fuel pump checked timing. Fuel pump is in the tank? if so what is best way to check pressure before dropping tank?

10

If you can, find the line turn the ignition ON if transparent you should see the in-fuel-tank fuel pump run fuel in the line upto the second pump in engine cabin. OR d/c fuel line from before the second fuel pump in engine cabin and turn the ignition to 'on'. Fuel should spill and continue to do so if the in-tank-pump is working. (unless the fuel system is intelligent enough to realize the line is disconnected and cut power to the in-tank-pump)

17,620

If it was the fuel pump would do it all the time not just going up hills. To check pressure remove rubber hose going to fuel rail and connect a fuel pump pressure tester to hose. You can rent the tester from part stores like autozone. Also there maybe something in the tank being sucked into pump when going up a hill.

105

Check IAC in throttlebody, is throttle plate clean, Coil defect ? Did you check the TPS ? Codes ?

105

To check fuel pressure, you need to attach a furl prezssure tester to the xchrader valve on the fuel line near the engine. Fuel pumps dont work intermittently.

1 out of 1 people think this is helpful.
105

Sorry about typos

Thank you everyone I will be trying several of these things tomorrow.

Your Answer

Add photo

Related Questions

  • Looses Spark Under Acceleration. Starts OK 4 answers

    I've had several fuel issues; thanks for the help, guys. Replaced fuel pump. Pump now checks out ok. Now, engine looses spark when trying to accelerate. 5.8L. I also recently replaced the starter, b...

    1996 Ford E-150 STD Econoline

    -

    Maintenance & Repair

  • 1999 Ford F150 V6 Trouble/Inconsistant Starting 5 answers

    I have a rear wheel drive 1999 Ford F150 V6. Last year I had some issues getting it started. I took it to a shop and they couldn't get it to not-start but thought my description sounded like a fuel ...

    1999 Ford E-150

    -

    Maintenance & Repair

  • (Please Help) High RPM when accelerating ... 2 answers

    When i exit off the freeway and i stop at light the motor still is tunning at high rpm and.when i sit with the car on (Parked) the rpm is high but after 3 mins or so it runs normal , When I start i...

    1993 Ford E-150 Custom Club Wagon

    -

    Maintenance & Repair

  • 95 ford e-150 5.0 idles wont accelerate dies out 6 answers

    fuel pump and filter changed

    Ford E-150

    -

    Maintenance & Repair

  • Why will it not accelerate correctly? 3 answers

    1988 E-150 with 302 Multi-port, new plugs, new fuel filter, new air filter, no cat. converter, fuel press. in rail is 37 p.s.i., MAP good, has a auto. trans w/overdrive... in overdrive it will hardley...

    1988 Ford E-150 Econoline Ext

    -

    General

E-150

Looking for a Used E-150 in your area?

CarGurus has 156 nationwide E-150 listings starting at $3,650.

ZIP:

Search Ford E-150 Questions

Ford E-150 Experts

#1 FordNut
FordNut
Reputation 630
#2 Tracy Hooks
Tracy Hooks
Reputation 490
#3 kbro
kbro
Reputation 420
View All

Related Models For Sale

Used Ford F-150
2,693 Great Deals out of 211,512 listings starting at $1,000
Used Ford E-350
234 listings starting at $495
Used Dodge Ram 1500
530 Great Deals out of 12,822 listings starting at $1,995
Used GMC Sierra 1500
937 Great Deals out of 62,257 listings starting at $1,395
Used Toyota Tacoma
616 Great Deals out of 35,102 listings starting at $2,155
Used Chevrolet Express
120 Great Deals out of 5,968 listings starting at $2,499
Used Ford F-250
512 listings starting at $3,500

Used Cars For Sale