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Engine cuts off under load - Cars & Trucks

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I would start with a close inspection of the wiring to the fuel shut down solenoid,see if there is a good tight connection on both ends of the harness and that there is no signs of the wires being chafed that could cause an intermittent short or open.

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Posted on Feb 15, 2012

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Posted on Jan 02, 2017

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1991 toyota 4runner 3.0 v6 cuts out under load


Could be maf or tps. Here are some test procedures:

Volume Air Flow (VAF) MeterOPERATION This component is used on 22R-E, 1FZ-FE, 3VZ-E and 3F-E engines.
This meter measures the amount of air flowing through the intake system. It is used by the ECM to calculate air/fuel mixture.
TESTING 22R-E, 1FZ-FE and 3VZ-E Engines
See Figure 1
Disconnect the wiring from the VAF meter.Using an ohmmeter, measure the resistance between terminals E2 and VS. Resistance should be as follows: 3VZ-E-200-600 ohms

3d23f7f5-25ac-415e-bb30-8a2de44707c6.gif
Fig. 1: Attach the ohmmeter to terminals E2 and VS

If the test is not within specification, replace the unit.



Throttle position sensors are usually mounted on the side of the throttle body. The sensor detects the throttle valve opening angle. The voltage of terminal VTA increases in proportion of the opening angle of the throttle valve. The ECM judges the driving conditions from the input signals of the terminals, and uses them as one of the conditions for deciding the air/fuel ratio correction, power increases and fuel cut-off control. 3VZ-E and 1FZ-FE Engines
Confirm that the throttle valve is fully closed.Connect an ohmmeter to terminals IDL and E2. E2 is the bottom terminal, while terminal IDL is positioned directly above it.
Insert a 0.020 in. (0.50mm) thick feeler gauge between the throttle stop screw and lever. Check for continuity between terminals IDL and E2 of the sensor. Continuity should be present.Insert a 0.031 in. (0.80mm) thick feeler gauge between the throttle stop screw and lever. Check for continuity between terminals IDL and E2 of the sensor. Continuity should not be present.
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Jul 29, 2017 | Toyota Cars & Trucks

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I have a 2007 Hyundai i30 petrol 1.6 comfort. It starts very easily as soon as the engine comes under a load when accelerating hard the engine cuts out as if the ignition is switched off.


Check the fuel pressure under a load first, if it is ok then try unplugging the Mass airflow sensor (MAF), if the engine runs ok (check engine light will come on) then the MAF is most likely defective.

Nov 28, 2016 | Hyundai i30 Cars & Trucks

1 Answer

ENGINE IDLE / ENGINE CUTS OFF


Its a sensor that increases the idle under load so it could be a sensor on the power steering rack or a sensor on the autobox when in drive with foot on brake ,its a sensor for sure but what and where i have no idea

Jan 29, 2014 | 2008 Chevrolet Trailblazer

1 Answer

Light Vibration and Humming sound in cabin


no posts on this old post. but no year, so .... as an example
to others posting, NO year?, NO answers.
but... here you go.
NOISE MOVING, ONLY !: (dangerous tests)
NO noise , in neutral, guning throttle like mad man.
or doing same in drive, all brakes set, wheels chocked,
DO the FSM A/T trannny Stall test. 5seconds max !, at 0MPH this puts full load on most the parts, MAKE NOISE NOW?
moving.....
cutting the engine , depends? in neutral? or coasting in gear.
risk 2, accidentally hitting park doing the test.
risk1:
selecting neutral and cutting the key (danger if the steering locks ) do so only off road, and no people about, no turns., no cliffs, no trees, no rocks. (flat desert or parking lot, at early hours..etc.)
Safety first.....
"and it goes off."<<< meaning the noise stops? key off?
btw:
the wheel bearing are under full load, now.
in turns the wheel bearing are under more load (huge in fact)
and the CVs run all the time.
but, if goes off means. no sound , it can be. (sure not wheel bearings)
1: exhaust parts, rattling. (running)
2: engine noise. (lots of possible) , but see test above.
3: A/T trans noise (its A/T right?) bad front, A/T pump? or TC?
or 150 other vastly complex A/T parts. bad.
when coasting , the CV do turn all the rear planetary gears ( and axle gears)
so they are not bad, as the quiet sound ending , proves.

keep in mind most parts, under torque love to make noise.
so cutting the engine, cuts most that torque, and hides the bad parts, with silence.

i use and remote electronic ear to find moving noise.
electronic stethoscope.
it has small microphones that clamp to suspected parts.
this removes most the danger in testing.

good luck finding it, if it still makes noise.


Aug 28, 2013 | Honda Civic Cars & Trucks

1 Answer

How to fix f85 codes in cadillac


this is what i found about code f85




QUESTION: 1991 Sedan Deville, 4.9 port injection
Car runs great until outside temp reaches 92 deg. or above. the car will start to cut out under load (take off or hill. if i pull over the car will idle fine rev the engine to a steady high rpm and it will cut out. i had a code e44 (o2 sensor rich)so i replaced o2 sensor with no effect. the other code received was f85 (Throttle body service required). I have checked all connectors and hoses attached to the throttle body. all ok. looking inside throttle body there ar two tubes under the flaps one is totaly restricted with a black buildup and the other partly blocked. Not sure what these tubes do and if that could cause engine to cut out when hot and under load. any ideas?

ANSWER: You found your problem which is this black residue which when hot turns to a jelly substance and blocks the idle air passage. You need to clean all that residue from the throttle body and do not forget to spray the small hole in the side of the throttle body just behind the throttle plate.

Dec 05, 2012 | Cars & Trucks

1 Answer

Excessive white smoke out of blow by


Just letting you know that white is water, blue is oil and black is gas coming out of the exhaust.

Jul 20, 2017 | Cars & Trucks

1 Answer

Engine idles perfectly and revs fine while in park. Under load the engine cuts out hard while accelerating at about 2000 rpm. Recently has had new throttle body, checked vac lines and actuator on air...


ur having fuel supply or poor electrical supply problem thats why the engine cuts off underload/ check spark plugs or airflow meter condition as well....

Apr 08, 2010 | 2003 Nissan Pathfinder

1 Answer

Took the Van in for inspection and it failed. Had


Check all vacuum sources for a leak. I wouldn't race engine over 3000 without a load on it.

Mar 15, 2010 | Pontiac Montana Cars & Trucks

2 Answers

1987 nissan pickup (z24) acts like there is a govner.


It is your coil. One coil cuts out under load and the other one runs full time. It'll run on either coil alone just fine. Your problem is that the one that is supposed to run full time has gone bad, the other coil which is supposed to cut out under heavy load is the only coil running your car. When it cuts out, the truck wants to quit until you let off and the computer (ECU) allows it to come back on. Should be able to find a new coil for $40 bucks. Good luck.

May 19, 2009 | 1987 Nissan Pickup

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