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What caused a deceleration chug with chevy 5.7 litre vortec

Let off gas to decelerate or unload engine by reaching top of a hill and the engine has an audible chug that can also be felt.

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Posted on Jan 02, 2017

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SOURCE: 1997 Malibu stalls at the top of upward slopping

If there is not a correct air:gas ratio of 14.6:1 to make the engine run, it is under-powered. When your engine loses the power, you can experience this symptom. It is not a problem with your transmission. If you have not had our engine checked out for spark and fuel injectors, it is the time to do it. However I believe the Fuel distributor is bad. Good luck.

Posted on Aug 14, 2009

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SOURCE: vehicle sputters and jerks when engine decelerates at low RPM

sounds like transmission overdrive not disengauging. should have the ol' gm 125 trans, a little electric solenoid goes bad and does this. will it start back up and be ok again? if so this is your answer

Posted on Aug 24, 2009

  • 169 Answers

SOURCE: 2001 Chevy Blazer Stalls on turns and deceleration.

this could be a tuffy possible fuel pump in take more likely elec is check engine light on go back to auto zone check for codes, check engine power & grounds

Posted on Aug 30, 2009

  • 4793 Answers

SOURCE: What causes yaw in rearend when car starts to

most likely cause is a weak spring,replace both,matched pair.another cause could be rubber bushes.jack up car to take weight of springs and see if you have any play in bushes.

Posted on Mar 19, 2010

Testimonial: "I had no idea what the problem was with the rear suspension on my 87 corvette, this gives me directions to explore. Thanks; VERY helpful!"

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SOURCE: I have a code misfire cylinder 5 and I am not sure

Cylinder numbering for your engine is 1-3-5-7 on the left hand bank and 2-4-6-8 on the right hand bank (passenger side). To be sure where number 1 is look across the cylinder heads number 1 cylinder is always the head that is furthest ahead towards the front of the vehiclek, then count 3 cylinders back on that side, should be left, and that should be number 5. pull the spark plug first and check it and at the same time pull number 3 's plug and swap the coils from 5 to 3. If the plugs are bad replace them all. Then run the vehicle and see if the misfire code followed the coil to number 3, if it does you know you have a bad coil, they usually run about 90 - 100 bucks each, that is if the plugs or wire wasn't the problem. hope this will help you. good luck.

Posted on Apr 08, 2010

Testimonial: "Replaced plugs problem solved...Thank god 23 bucks and problem solved"

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1 Answer

Car deceleration acceleration


Unfortunately your issue is intermittent. You may need to wait for it to get worse or become more consistent, for the dealer to recognize the cause. There isn't just one reason for this to happen. If the failure was detected by the ECU then it would turn the engine light on and store codes. If you don't see the engine light illuminate then it is possible that the issue is being caused by something mechanical. A malfunction with the Alternator, a dirty fuel system, EGR or the TAC (Throttle actuator Control) valve could cause your problem. I wish I could be more helpful but I need more information. Good Luck.

Mar 01, 2014 | Toyota Tacoma Cars & Trucks

1 Answer

Engine noise when decelerating' 3.0 liter toyota


Check for improper timing and injector

Dec 04, 2013 | 1991 Toyota 4Runner

1 Answer

Acceleration Problem


Could be fuel pressure or a blocked fuel filter. need more test information,

Jan 17, 2013 | 2003 Kia Rio

1 Answer

At highway speed, as the car transitions from a set speed to slight deceleration (slight easing off the gas pedal) or from a hard deceleration (foot completely off the gas pedal) to a very slight...


sounds like your egr valve is opening too far at part throttle and sticking open. it is actuated by solenoids that open and let engine vacuum in. you were on a good path in checking the vacuum lines. however this may require replacing the egr valve and gasket. the egr valve is circular in shape on top and usually is bolted down with two bolts. its located on the engine side facing the firewall.

Jun 12, 2011 | 1995 Toyota Camry

1 Answer

Obd2 system rediness status won't clear so I can run the smog test due to replacing the battery.


takes a long time to run the rediness test since there are 6 different tests to complete...

PROCEDURE 1
EVAPORATIVE EMISSION SYSTEM LEAK MONITOR
Inspection Conditions
Engine coolant temperature: 30°C (75°F) or less (The engine is stopped before the test drive is started).
Atmospheric temperature: 5 - 30°C (41 - 113°F).
Condition of A/T: Selector lever D range.
Fuel remained in fuel tank: 30 - 50% is recommended.
Time required: 16 minutes or less after started the engine.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position. Well be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 89 km/h (55 mph) or more.
While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 89 km/h (55 mph) or more and travel for 16 minutes.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.

PROCEDURE 2
FUEL TRIM MONITOR
Drive Cycle Pattern
Inspection Conditions
Engine coolant temperature: 100°C (212°F) or less.
Atmospheric temperature: -10 - 60°C (14 - 140°F).
Condition of A/T: Selector lever D range.
Time required: 30 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 89 km/h (55 mph) or more.
While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 89 km/h (55 mph) or more and travel for 30 minutes.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position

PROCEDURE 3
CATALYTIC CONVERTER MONITOR
Drive Cycle Pattern
Inspection Conditions
Atmospheric temperature: -10°C (14°F) or more.
Condition of A/T: Selector lever D range.
Engine coolant temperature: Not set.
Time required: 16 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 89 km/h (55 mph) or more.
Travel for 300 seconds or more while keeping the vehicle speed at 89 km/h (55 mph) or more.
Decelerate until the vehicle speed is within 80 km/h (50 mph) or less.
While traveling at 56 - 80 km/h (35 - 50 mph) for 10 minutes or more, fully close the throttle at least once in 2 minutes and decelerate for 10 seconds or more.
Do not repeat deceleration too often.
Vehicle speed may go below 56 km/h (35 mph) after the deceleration.
Stopping and braking are permitted. (If stopped or drive at 56 km/h (35 mph) or less for more than 5 minutes the monitoring may be stopped. In this case please restart monitoring from the beginning.)
After completing the above deceleration, bring the vehicle speed back to 56 - 80 km/h (35 - 50 mph) and keep it in the range until starting the deceleration again.
Repeat the above deceleration at least 5 times.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position

PROCEDURE 4
HEATED OXYGEN SENSOR MONITOR
Drive Cycle Pattern
Inspection Conditions
Engine coolant temperature: 100°C (212°F) or more.
Atmospheric temperature: -10°C - 60°C (14 - 140°F) or more.
Condition of A/T: Selector lever D range.
Time required: 16 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 56 - 80 km/h (35 - 50 mph).
While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 56 - 80 km/h (35 - 50 mph) and travel for 16 minutes or more.
Stopping and braking during this operation are permitted. Keep the accelerator opening degree constant for 1 minute or more after each acceleration.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position

PROCEDURE 5
EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR
Drive Cycle Pattern
Inspection Conditions
Engine coolant temperature: 100°C (212°F) or less.
Atmospheric temperature: 5 - 60°C (41 - 140°F).
A/C switch: OFF.
Condition of A/T: Selector lever D range.
Time required: 16 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 56 - 80 km/h (35 - 50 mph).
While traveling 16 minutes or more at 56 - 80 km/h (35 - 50 mph) with engine speed 2,000 r/min or above, fully close the throttle at decelerate for 5 seconds or more until the engine speed reaches 1,000 r/min or under.
Do not repeat deceleration too often.
Stopping and braking are permitted (Rapid deceleration and sharp steering are not permitted).
After completing the deceleration, bring the vehicle speed back to 56 - 80 km/h (35 - 50 mph) and keep it in the range until starting the deceleration again.
Repeat the above deceleration at least 8 times by fully closing the throttle valve.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position

PROCEDURE 6
OTHER MONITOR (Main Components, Sensors & Switches, Wire Breakage & Short Circuit)
Drive Cycle Pattern
Inspection Conditions
Engine coolant temperature:
100°C (212°F) or less (Except engine coolant temperature sensor monitoring).
30°C (86°F) or less (Engine coolant temperature sensor monitoring).
Atmospheric temperature:
5°C (41°F) or more (Except engine coolant temperature sensor monitoring).
-10°C (14°F) or less (Engine coolant temperature sensor monitoring).
Condition of A/T: Selector lever D range.
Time required: 21 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start
Accelerate until the vehicle speed is 56 km/h (35 mph) or more.
While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 56 km/h (35 mph) or more and travel for 16 minutes or more.
Return the vehicle to the shop.
After stopping the vehicle, continue idling for 5 minutes, and then turn the ignition switch to the "LOCK" (OFF) position. Moreover, the vehicle should be set to the following conditions for idling.
A/C switch: OFF
Lights and all accessories: OFF
Transmission: Neutral

Sep 15, 2010 | 1998 Mitsubishi Eclipse

1 Answer

1994-95 acura intergra check engine light goes on when decelerati


Have you checked your codes to see what the car is asking for?Most times a vehicle computer will do a fuel tank vacuum/pressure check when decelerating.

Jun 12, 2017 | 1994 Acura Integra

1 Answer

1986 toyota deceleration problem


Hi,

If I understand your concern, you have backfiring when decelerating, if yes, a possibility is that your air/fuel ratio is too lean, there is too much air and/or too little fuel. This could also be brought about by using free breathing air filter (such as K & N) instead of the original air box/filter and no re-jetting/re-calibration done. Either that or the exhaust system has been modified or replaced with free flow, headers or sport tuned. If yes, then either the carbs have not been re-jet or the injector has not been re-calibrated. It may also require re-mapping of the ECU.

Depressing the clutch when decelerating disengages the load and therefore no engine breaking is happening.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 05, 2008 | 1986 Toyota Corolla 2 Door

1 Answer

'93 Aerostar-stalls while driving/scary-stalls in 'drive' at stops


Wow!!! Now that's a headfull of problems....
This could be a great many things...
Check these before you sell. I have a '93 Aerostar and can't live without it.
1. Check idle speed
2. Fuel filter may be clogged or water in the fuel system.
3. Choke improperly adjusted or sticking.
4. Distributor components damp or damaged.
5. Faulty emissions components.
6. Faulty or incorrectly gapped spark plugs/ Also check wires.
7. Vacuum leak at the carburetor/fuel injection unit or vacuum hoses.
8. On 1986 models, stalling during idle or deceleration may be caused by sludge in the throttlebody. (2.3 litre engine)
9. On 1986 & 1987 models with a 2.3 litre engine,hesitation or stalling during acceleration may be caused by carbon build-up on the intake valves.....I hope this helps!! Adios

May 23, 2008 | 1993 Ford Aerostar Extended

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