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Why would a VW air cooled engine backfire while idling.

I let it idle to warm up in the cold weather & it stars to back fire while idling

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Check the point gap, file ,clean and adjust.Point/ condenser, New cap and rotor, wires and plugs , all for good spark. Unburnt fuel igniting is a backfire, Tune up vehicle and if that doesn't work, then you need to check valve lash.

Posted on Dec 15, 2014

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Why does my peugot 206cc 2litre backfire when cold starting


Have it scanned for error code. Idle Air system may foul up. Coolant temperature sensor giving wrong readings will confuse the ECU. It may use 'warm' setting for cold starting, thus fuel would be lean. Ideally it should use 'cold' setting which provides richer air/fuel mixture.

May 11, 2014 | 2006 Peugeot 604

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Free seized engines


When the weather is warm, we rely on our car's cooling system to keep temperatures in the engine compartment under control, and keep us on the road. Your cooling system is a series of components that circulate coolant through the engine to absorb heat, then circulate air around the coolant to get it out. If any part of the system stops working, you're on the side of the road while your engine takes a steam bath.The best medicine is preventive. You should flush your radiator on schedule to keep the system clean and well flowing. Unfortunately we aren't always lucky, and things go wrong. Let us help you figure out why your car or truck is running hot or overheating.
Problem with 2000 BMW 528i idling problem when you start the car in the winter time. The care starts by idling aroun 1000rpm, which is normal for a cold engine start, but within 30 seconds it drops down to about 750rpm. Now the problem is that it fluctuates between 750rpm and 250rpm, almost shutting down, and sometimes does shutdown.
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1. I would first try to clean out the Idle control valve...some people have seen a 30% increase on cold start idle, there are several links in the DIY section.

2. If the sounds like classic Vanos seal issues. I had the same problem with mine in the cold weather. It would go away after the car warmed up. Replaced the Vanos seals and the problem disappeared.
3. Make sure you get the correct replacement seals or you'll end up with the same problem down the road.

Jun 04, 2013 | 2000 BMW 528i

1 Answer

Car over-heats and heats blows cold air


It sounds like the radiator is low on coolant.
You could also have air pockets in the cooling system if the system is not full of liquid.

Jan 15, 2013 | 1998 Lincoln Continental

1 Answer

No heat while car is idling


Sounds like low coolant level.. If it's extremely cold out, say 10 below zero or more, it could just be plain to cold. In that case, temporarily blocking a portion of the radiator with a cardboard cutout can help,, but make absolutely sure the cardboard is in front of the radiator, between the cars grill and the radiator, and not anywhere it could absorb fuel or oil and cause a fire... Also,,, make sure it's removed when the weather warms up in the spring. But I expect you'll find your coolant is low and when the engine is at idle, you not getting good flow of heated coolant through the heater core.

Jan 15, 2013 | 2007 Nissan Maxima SE

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Heater issues


Change engine cooling system thermostat.

Oct 30, 2012 | Cars & Trucks

2 Answers

Im looking at a 95' dakota. what is the most commin repairs in this vehical and maintenace


i have had 2 Dakota's a 4 cyl "LACK OF POWER" but never had a problem.
the other A 318 V8 14mpg but was a beast 4wheel drive the only problem I had with the v8 was when it rained water got on the dash bord,,,never figured out where it came from,
BUT I'd buy a 98 or newer one...
PROBLEMS LISTED BELOW!!

Air conditioner: If the air conditioner gradually stops cooling and/or the airflow from the vents decreases, the computer (PCM) may not be sending a signal to the compressor clutch relay to cycle off, which causes the AC evaporator to freeze up. (1991-95)

Automatic transmission: If the transmission will not engage when first started, chances are the torque converter is draining down. Chrysler will correct the problem by installing a check valve. (1993)

Automatic transmission: If the transmission won't upshift in cool weather, it is probably due to defective cast iron seal rings in the governor drive. (1992-94)

Engine fan noise: In warm weather, the fan makes a roaring sound. Dodge will replace the fan, the fan clutch, and, on max cooling systems, the radiator cap. (All)

Exhaust backfire: Exhaust backfire and/or a popping noise in the exhaust may be caused by a defective Powertrain Control Module. (1994-95)

Oil leak: Rear main seals on 2.5- and 4.0-liter engines are prone to leakage. To prevent future failures, Chrysler has a rubber plug available that goes in a hole above the starter that protects the rear main seal. (1996)

Oil leak: Oil leak at the filter on 3.9-, 5.2-, and 5.9-liter engines is likely due to a warped adapter plate. (1995)

Oil pump: Oil pump gear wear results in bucking and surging when the engine is warm and lack of lubrication when the engine is cold. (1992-93)

Rough idle: Because of a problem with the idle air control motor, the engine idles rough, stalls at low speeds or when decelerating, especially in warm weather. (1992-94)

Suspension noise: Front ball joints wear prematurely forcing relacement of lower control arm as well. Replacement joint with grease fitting is now available. (1990-96)

Transaxle leak: Automatic transmission fluid leaks from the speed sensor in the transmission. (1994)

Water leak: The roof seams leak water that seeps down behind the dashboard onto the floor. (1993-95)

Dec 08, 2010 | 1995 Dodge Dakota

1 Answer

I have a 1988 mk 2 golf when i start the engine the heater warms up as normal but when the engine warms up the heater starts blowing cold air out. also now that the cold weather has started after driving...


sounds like the thermostat stickng as when engine gets cold the choke will start workin again, causing the over reving or your electric fan is on all the time "over cooling" the engine

Dec 22, 2009 | 1988 Volkswagen Golf

1 Answer

Cold weather won't idle, engine dies


Please check your idle controller whch is normally located near the air intake.Sometimes cleaning them and putting them back solve this problem.

Dec 08, 2009 | 2001 Ford Ranger Regular Cab

1 Answer

Engine Stalls when Cold on 1999 CRV


this sounds like the idle air control valve could be dirty or stuck. you can remove it to clean it

Apr 06, 2017 | 1999 Honda CR-V

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