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1987 ranger v-6 engine surges with steady accelerator suspect fuel/air problem

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Sounds like the throttle posisioning sensor

Posted on Jul 28, 2009

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1 Answer

My 1990 Toyota with a 22re engine surges while holding accelerator steady


Fuel pump and/or pressure regulator is messed up - If gas flow is surging so will the engine. Right?

Sep 12, 2015 | 1990 Toyota Pickup

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Manuel fuel pump on 1987 dodge dakota will not hold preaaure


u mean mechanical pump it does not like the electric fuel pump does ur pump depends on the rotation of the engine if engine stops d pump stop too

Mar 13, 2014 | 1987 Dodge Dakota

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Cant get passed by emission test. No codes are coming up but someone keeps saying evap system Catalytic converter, fuel pump, gas cap. O2 sensor has been replaced . Also eating alot of gas. Engine light...


You have to do a drive cycle, the fuel tank has to be between 1/4 and 3/4 of a tank of fuel, can not be above or below this fuel level.
To perform an OBDII Driving cycle do the following:

1. Cold Start
In order to be classified as a cold start the engine coolant temperature must be below 50ºC (122ºF) and within 6ºC (11ºF) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.

2. Idle
The engine must be run for two and a half minutes with the air conditioner on maximum and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.

3. Accelerate
Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.

4. Hold Steady Speed
Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.

5. Decelerate
Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.

6. Accelerate
Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.

7. Hold Steady Speed
Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.

8. Decelerate
This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

Aug 26, 2011 | 2001 Pontiac Grand Am SE

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

1987 ranger v-6 surges while driving with steady accelerator


Do you hear clicking sound also?

It can be the wheel bearing and or front hub.

Put the Ranger on a lift and spin the tires.

If there is resistance then pull the wheel off and inspect the inner and outer bearings.

Check them or re-pack them with grease.

Check CV if it's a 4WD truck.

Good luck

Jul 15, 2009 | 1987 Ford Ranger

2 Answers

1991 Caprice Classic 305 engine surge


Check the fuel pump pressure.
Also can replace the fuel filter, cheap and might help.

Jul 04, 2009 | 1991 Chevrolet Caprice

1 Answer

Truck is surging


ho the throttle position sensor will cause the truck to surge.

Jan 31, 2009 | 1988 Ford F 150

1 Answer

2006 HSE RR....engine pulsates slightly when light acceleration


1. Fuel Pump pressure too low
2. Dirty air or fuel filter
3. Plug wires running parallel for more than 6" )cross em over each other or you get crossfire)
4. Crack in Intake manifold or split end on one of your vacuum lines or vacuum cap plugs

Check 'em out and let me know!

Jan 27, 2009 | 2006 Land Rover Range Rover

2 Answers

Surging under acceleration


sound like a fuel starvation problem first try a new fuel filter. and go from there

Sep 10, 2008 | 1987 Nissan Maxima

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