Question about 1990 Volkswagen Fox

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1990 VW Fox Fuel/Engine Miss

1990 Volkswagen Fox GL Engine Starts right up, but after it kicks down from high idle it hesitates during acceleration and over fuels, but once traveling at consistent road speed the miss goes away. Gets poor fuel mileage.

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  • boozer85 May 30, 2009

    Already did all of the above

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  • Volkswagen Master
  • 14,036 Answers

Change air filter.and fuel filter. replace plugs and wires.check tires air pressure.

Posted on May 30, 2009

  • Jonah Oneal May 30, 2009

    did you change ignition coils.also have it scan to check the tps sensor it causes hesitation.

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1 Answer

Where is the fuel filter located on a 1990 VW Fox


Volkswagen Fox Fuel Pumps are located inside your gas tank; being as liquid gasoline is not combustible, this is the best position for installation. Your car's Volkswagen Fox Fuel Pump is an apparatus that operates to move fuel out of the tank to the motor. Your car's Volkswagen Fox Fuel Pump pressurizes the fuel system to move gas from the fuel tank to the engine.

Feb 23, 2015 | Cars & Trucks

1 Answer

My car hesitates when accelerating and slows down when going over bumps. My car is a 1989 VW Jetta GL


For some reason your engine is becoming starved of fuel or air. You'll need to have the computer scanned and see what errors are being thrown. It sounds to me like you have a loose connection somewhere, possibly to your fuel pump. A scan should tell you where to start looking. A repair shop can do a scan, or some autoparts stores (like Autozone) will do a scan for free.

Oct 27, 2013 | Volkswagen Jetta Cars & Trucks

1 Answer

1963 vw newly rebuilt engine, starts then dies at RPM acceleration


Could be one or both of two things.

1. The accelerator pump in the carb is clogged, the linkage is unhooked, or the diaphram in the pump is bad. It's cheap to replace and comes in the carb rebuild kit. This usually just causes hesitation when you step on the gas pedal. It doesn't usually cause the engine to stop running.

2. More likely is that the main jet in the carb is clogged. At idle, high vacuum under the closed throttle plate in the carb causes fuel to flow thru the idle jet. As the throttle plate opens (as you step on the pedal), the vacuum under the plate dissipates, stopping the flow of fuel thru the idle jet, and the vacuum ABOVE the throttle plate increases, which is supposed to then draw fuel from the carb bowl thru the main jet in the carb. If the main jet is clogged with dirt, then it can idle just fine and die as soon as you step on the pedal.

Jul 24, 2011 | 2000 Volkswagen Beetle

1 Answer

What is the drive cycle for a 1999 vw jetta


The drive cycle is as follows
For all OBD2 VW's

OBD-II Drive Cycle Stages
The OBD-II Drive Cycle is an eight-stage course, as illustrated in the
chart on page 3. An explanation of each step is provided below.
Stage 1: Cold Start-The ECM determines the presence of a cold start
by comparing the engine coolant temperature to the ambient air
temperature during startup. The engine is considered cold when:
• Engine coolant temperature is below 122°F (50°C).
• Engine coolant and intake air temperatures are within 11°F (6°C) of
each other at startup.
During this period, the O2S heater, misfire, AIR, fuel system, and EVAP
monitors run.

Stage 2: Idle 2½ Minutes-Turn the air conditioning (A/C) and
headlights on to help the misfire monitor-the additional electrical loads
help even out combustion pulses. During this period, the O2S heater,
AIR, EVAP, misfire, and possibly fuel system (if operating in closed loop)
monitors run.

Stage 3: Accelerate-Prior to accelerating, turn off the A/C and
headlights (if possible). Open the throttle halfway until you reach
55 MPH (89 KPH). During acceleration, the misfire, fuel system, and
EVAP monitors run.

Stage 4: Steady State Cruise-During this portion of the cycle, the
O2S, AIR, EGR, EVAP, misfire, and fuel system monitors run.

Stage 5: Decelerate-Gradually coast down without applying the
brakes. Also, on manual transmission vehicles, remain in high gear and
do not press the clutch. During this period, the EGR, EVAP, and fuel
system monitors run.

Stage 6: Accelerate-Apply ¾ throttle until reaching 60 MPH (97 KPH).
During acceleration, the misfire, fuel system, and EVAP monitors run.

Stage 7: Steady State Cruise-During this period, the CAT, O2S, AIR,
EGR, EVAP, misfire, and fuel system monitors run.

Stage 8: Decelerate-Gradually coast down without applying the
brakes. Also, on manual transmission vehicles, remain in high gear and
do not press the clutch. During this portion of the Drive Cycle, the EGR,
EVAP, and fuel system monitors run.

You can try this a couple times, but if it doesn't work you should go to a VW specialty shop like the dealer or a shop that does mostly European cars and they can use the scan tool to force the car through readiness.


Oct 11, 2010 | 1999 Volkswagen New Jetta

1 Answer

I have a 1990 vw vanagon it will shut off when at idle, once it is warm it idles fine


Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Jun 13, 2009 | 1990 Volkswagen agon GL

2 Answers

Fuel injectors or fuel destributor


do not attempt to take apart fuel dist bad news pull off fuel inlet line spray dist full of carb cleaner try agin let me know has car been setting hey vote for me okl

May 26, 2009 | 1990 Volkswagen Fox

1 Answer

Hesitates on acceleration


Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.

I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.

If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.

I hope this helps! -Nick

Apr 10, 2009 | 1983 Chevrolet Chevy

1 Answer

Have a 1990 vw golf


You have to clean up the fuel pump, and see whether it does or not require replacement. Do also the same with the starter engine, and see if the carbons are in good state or not.

Jan 12, 2009 | 1990 Volkswagen Golf

1 Answer

Hesitation or stumble during acceleration


take your car for a tune up
if they are carburetor type motors you may need your carbie cleaned and a tune up
if you clean it your self with carbie cleaner it may increase in idle speed this is nothing to worries about it is a simple adjustment
with a carburetor type motor they tend to idle higher when their cold this is the automatic choke kicking in and normally it should happen till the car is a bit warmer and the accelerator has been depresses
although a car should idle at 800 rpm my paddok car dose when it is cold it idles at 1200rpm i like it this way as the car warms up quicker as i will not drive a car while it is cold
hope this helps
ricko

Oct 20, 2008 | 1989 Nissan Pathfinder

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