Question about 1989 Chevrolet K1500

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Auto Emission Problem

While driving normal speed of 55mph it starts buckingand surging and acts like am running out gas I get a code32 and 44 on reader which is
oxy sensor and egr sensor is there any thing else i should check it is a 1989Chevy 4by4 with a 350 eng

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EGR FOR SURE I WOULD CLEAN OR REPLACE AND CHECK OUT KNOCK SENSOR

Posted on Feb 14, 2009

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rough idle, stalling, loss of power. - CarGurus


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1998 Dodge Stratus 2.4l bogs down suddenly while at cruising speed


You need to get the engine trouble codes by performing the "keydance" or using a code reader, then start checking fuel pressure at pump and regulator. Best luck. Amclaussen.

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Truck surges (Vibrates hard) under load when warm.


I would start by changing the trans filter and fluid, and go from there . it could be your overdrive acting up try to drive it in 3 and see if it happens, how many miles are on it ? and sometimes you can lightly apply brake and get o.d. to kick out not sure on yours if that works or not, because if you can get it to kick out then you can diagnoise if it is the culprit ! sounds like it though, at Car Quest Auto they sell additive that is supposed to take care of shuddering in o.d. but can't remember the name of it ...sorry

Aug 22, 2012 | 1997 Chevrolet K1500

1 Answer

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.

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2004 Mazda6 sport wagon with V6. The engine light has come on and the engine is surging up and down in nuetral or in drive with the brake on. Brake off and the car wants to surge and back off. Once...


First thing to do is take the car to your local autozone or the likes and they can check what error code is being thrown. Once you know that it wil help narrow down the problem greatly.
thank you,
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While on vacation, our 2002 six cylinder automatic started acting up. With the gas pedal depressed for normal driving, the car started to "modulate" (the rpms would drop and race back up...


check to make sure airfilter is ok and maf sensor is clean. then check out tps ( throttle position sensor ), here are a few causes of a bad tps sensor--- transmission shift issues, bucking, jerking, idle surging, engine cutoff, hesitation on takeoff, surge while cruising down highway. if light on dash is on get it scanned to find problem code. most auto parts stores will do this for free. auto-zone etc. here are a few symtoms of a bad maf sensor-- surge, slip condition underload. the mass air flow sensor may be degraded or contaminated. stalling, misfiring, poor acceleration. ( a check engine light may not come on ). a lot of times just by cleaning maf sensor cures the problem. GOOD-LUCK!

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1 Answer

Check engine light came at stop light. truck driving fine no problems


The check engine light is part of the vehicles emission system.This normally won't effect the running of the automobile , but it will fail emission inspection( if required in your state). It could be anything from faulty gas cap to bad spark plugs causing it to come on. Most auto parts chain ( i.e. Advance or Auto Zone) offer free diagnostics for the light , to find out why it is coming on.

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scan it. check vechicle speed sensor

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1986 Chevrolet Celebrity - Surging Eratic Acceleration


Sounds like you have a vacuum leak somewhere causing the engine to flood.Check all hoses coming fron intake manifold.

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