Engine bogs out no power

Tiny
DAVIDMCCORKLE
  • MEMBER
  • 1994 FORD TAURUS
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 143,490 MILES
When I give it gas it bogs out and has no power. Tune up?
Tuesday, December 8th, 2009 AT 11:20 PM

32 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I have seen the fuel pump cause this but to be sure lets take a look at the fuel pressure these guides can help us and the video shows the pump being replaced in a similar car.

https://youtu.be/SOmd3BoE4YU

and

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

and

https://www.2carpros.com/articles/engine-has-low-power-output

Please run down these guides and report back.

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Wednesday, December 9th, 2009 AT 2:42 AM
Tiny
TAURUSSHO1
  • MEMBER
  • 1 POST
  • 1994 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 93,450 MILES
My vehicle a 94 3.2 sho is running rich at idle, and will not rev up, it blows blue smoke out the exhaust and seems to be backfiring. I just put this engine in. It has approx 93,000 miles on it and was sent with a certified engine check stating the engine was in excellent condition. Could the ignition system be at fault? Give me your opinion please. Thanks michael
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,706 POSTS
The blue smoke sounds like oil. Are you getting any fuel in the oil? Have you checked the temp sensor to make sure it's not telling the computer it's much colder that it actually is? If you pull a plug, are they wet? Was the engine a direct replacement? Check engine light on?
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
RSUKOVICH
  • MEMBER
  • 84 POSTS
  • 1994 FORD TAURUS
Transmission problem
1994 Ford Taurus 6 cyl Front Wheel Drive Automatic 170K miles

Re: 3.8 L engine. Car was running perfectly and then problem arose due to loss of trans fluid. No pickup, running hot. I replaced quart and one half of fluid but with no apparent major improvement. Could damage have occurred that cannot be corrected with just merely replacing the fluid or could something else happened that is not trans related? Can you recommend any further tests that might confirm that trans is damaged.
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Running hot !
Check coolant and check for a headgasket
as if have an engine failure that would effect the tranny
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
RSUKOVICH
  • MEMBER
  • 84 POSTS
3.8 L engine. I just thought about another thing. Although my car is a '94 Taurus, apparently it has a '95 engine, which I found out when I had to replace the oil pressure switch. They work exactly the opposite of each other. The thermostat that the give me at the auto store is 195 degrees and I'm wondering if it should be 185 degrees. I don't thing there is a problem with the head gasket.
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
195 should be OK
but if you like to switch back to the 185 would be better to run at lower temp.
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
11SSAVAGE
  • MEMBER
  • 1 POST
  • 1994 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 107,500 MILES
What would cause my 1994 ford Taurus to bog down when you push the gas and make it have like no power?
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Clogged convertor, low fuel pressure.
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Also problems with MAF
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
LOUISFRAGE
  • MEMBER
  • 1 POST
  • 1994 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
Every two seconds when on the had pedal loses power like it's running on half the cylinders barely maintains speed.
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the following below:

Oxygen sensor
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
Cap and Rotor

If it doesn't apply disregard it
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Saturday, August 22nd, 2020 AT 10:41 AM (Merged)
Tiny
JOE THJE MAN
  • MEMBER
  • 1 POST
  • 1994 FORD TAURUS
Computer problem
1994 Ford Taurus 6 cyl Front Wheel Drive Automatic

So the problem like that, at the car starts but every time push the accelerator pedal, it won't accelerate instead the rpm goes down to a full shut down. When let run without accelerating it runs but with a rpm les than 500, yesterday it shuts and I ried to restart the car now all the lights are on from the dashboard but the starter wont even crank my questions:
the low rpm is because of the the car computer?
And can the computer prevent the starter from starting?
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Saturday, August 22nd, 2020 AT 10:42 AM (Merged)
Tiny
JGAROFALO
  • MECHANIC
  • 489 POSTS
Low RPM can be caused by the computer if it is receiving bad information from the sensors. It can also be caused by a bad ISC motor (idle speed control). BUT - with the "check engine" light flashing, you have other problems. Start by checking the fuses in the power distribution box under the hood. Also check the grounds where they attach to the radiator support. If the ground is bad to the integrated controller module on the radiator support, the car will not start or run.
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Saturday, August 22nd, 2020 AT 10:42 AM (Merged)
Tiny
SAVIS
  • MEMBER
  • 2 POSTS
  • 1993 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 180,000 MILES
I have a 93 taurus sho. It idles great. However when you increase engine speed the engine begins to miss and when decelerating the engine dies. The engine will also stall when driving highway speeds. I did a troublecode check and the code reader came back with the following codes: 336,411,538,632. What could be the problem?
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Saturday, August 22nd, 2020 AT 10:43 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
What do you have for fuel pressure
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Saturday, August 22nd, 2020 AT 10:43 AM (Merged)
Tiny
SAVIS
  • MEMBER
  • 2 POSTS
The pressure is 34 at idle and 40 at 3500rpm. Pressure is steady
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Saturday, August 22nd, 2020 AT 10:43 AM (Merged)
Tiny
BRETTSZ
  • MEMBER
  • 1 POST
  • 1993 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
My wagon has trouble accelerating from idle after highway driving. After stopping at a red light, the car idles smoothly, but when I press the accelerator, nothing happens for 3-7 seconds except some sputtering. After that, the car accelerates smoothly and has no trouble until I stop again. The service light is lit, but the codes say it is an AC compressor. The AC has not worked in years. The car does it when it is cold, but it is much more noticeable after highway driving. I have replaced the plugs, wires, distributor cap, and rotor in an effort to solve the problem, with no effect. To top it off, my mpgs have tanked to about 17 hwy. I am struggling here guys. Any ideas?
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Saturday, August 22nd, 2020 AT 10:43 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure/mass airflow and throttle position sensors to include the EGR valve.
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Saturday, August 22nd, 2020 AT 10:43 AM (Merged)
Tiny
JGAROFALO
  • MECHANIC
  • 489 POSTS
The big suspects are the TPS (throttle position sensor) and the MAF (mass air flow sensor). Also, you could have an air leak in the intake path.

It is possible that the code that was received was misinterpreted to be a problem with the A/C. Having said that, continue to the real diagnostics.

The TP sensor will set a code if it malfunctions - but not every time. If the sensor sends the PCM a "dirty" signal, it can cause hesitations. This is a good place to at least check. Check for dirty connections or corrosion on the connections.

Then there is the Mass Air Flow sensor and associated ductwork. The purpose of the mass air flow sensor is to tell the PCM how much air is entering the engine at any given time. The PCM then admits the proper amount of fuel to combine with that air to achieve the proper mixture. Any leaks of unmetered air into the engine will disturb that "perfect" mixture. Check for any kind of vacuum leaks. Examine the PCV and brake booster lines in particular. Examine the duct that goes from the MAF to the intake of the engine. Air leaks in that area are cause for major driveability problems.

Also, be warned that if the MAF goes out of calibration, in MANY cases, it will NOT set a code. If the signal it sends to the PCM is within a reasonable range - even if it is incorrect - the PCM will be satisfied, and will not set a code.

Hope this will be of some help to you. Good luck!
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Saturday, August 22nd, 2020 AT 10:43 AM (Merged)

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