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Okay, I bought my 1st beetle used just about 3 months ago, it is a 2003 New Beetle 2.0 engine and I have been having some problems. I think they might be connected but my mechanic can't figure it out. Because the only code it has is a code for the cooling system, found out that my thermostat is stuck open.

Problem 1: When you get to around 45 to 50mph the speedometer slows down, found out when I got pulled over going 87 in a 65. My speedometer said that I was going 65.

Problem 2: I cannot use the speed control, when I turn it on it keeps speeding up and slowing down.

Problem 3: which is the biggest problem, I filled my car up drove it to work and it sat in the parking lot for about 10 hours, got in it to go home, it is turning over but there is no spark, I checked the fuel pump it is kicking on, I thought that it might be viper lock so I got some cleaner that just made it back fire.

Please someone help me. This is my only way of transpiration and I commute over 50 miles a day for work.
 

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1. You may have a problem with the speedo cluster itself or other problems. Check out these threads for more info:

http://newbeetle.org/forums/questions-issues-concerns-problems-new-beetle/128410-speedometer-odometer-cruise-not-working-right.html

http://newbeetle.org/forums/2-0-liter-gas/128361-instrument-cluster-interchangeable.html

2. The cruise control switch; can have problems with dirty contacts inside the switch. This can be fixed; by using electronic contact cleaner. My Beetle; would speed up/down, which created a "bucking" type of problem, when driving on the highway and after cleaning the switch, it fixed the problem.

Typically, it will throw this code:

00895 - Cruise Control Switch (E45): Defective

http://wiki.ross-tech.com/wiki/index.php/00895

Here is a good thread; about cleaning the switch and testing the problem:

http://forums.tdiclub.com/showthread.php?p=825571

For the spray cleaner; I used the CRC 5103 Quick Dry Electronic Cleaner - 11 Wt Oz. You can find this at any auto parts store; I found the best price, at my local Walmart.

3. A common issue; when you fill up a gas tank, is there will be problems with the N80 Purge Valve (sticking or not working) and this results in a no start condition. The purge valve issue; can cause this trouble code to be thrown:

16825/P0441/001089 - EVAP Emission Control Sys: Incorrect Flow

16825/P0441/001089 - Ross-Tech Wiki

N80 purge valve location #1:

http://workshop-manuals.com/volkswagen/new_beetle/l4-2.0l_(azg)/powertrain_management/emission_control_systems/evaporative_emissions_system/canister_purge_control_valve/component_information/locations/fuel_injection_system_component_locations_overview/

N80 purge valve testing and replacement:

http://workshop-manuals.com/volkswagen/new_beetle/l4-2.0l_(azg)/powertrain_management/emission_control_systems/evaporative_emissions_system/canister_purge_control_valve/component_information/testing_and_inspection/with_manufacturers_scan_tool/

fuel pump testing:

Volkswagen Workshop Manuals > New Beetle L4-2.0L (AZG) (2003) > Maintenance > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > Specifications

coil pack testing:

Volkswagen Workshop Manuals > New Beetle L4-2.0L (AZG) (2003) > Powertrain Management > Ignition System > Ignition Coil > Component Information > Testing and Inspection > With Generic Scan Tool

One aspect; which seems odd, is the fact that the car backfired without any spark. Let us know; how you performed a ignition spark check.

Do a fresh scan of the car and check spark, fuel pressure and we can go from there. Thanks.
 

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Discussion Starter #3
Update. My cousin and I looked at the bug on sunday. We found that the fuel pump was kicking on. We popped out a spark plug and found that they were all good and not the issue. I had fuel going to the motor so I wasn't vaper locked and my starter was working. We thought tht it might be a fuse so we checked them out they were all good. We have a generic code reader and the only code we got was the coolent code. We fixed tht and now we don't see any codes.I called the local shop and they picked up the bug today. I heard tht it might be my ignition key, have all one heard of tht?
 

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It sounds like you have more than one grimlin (speed cluster was never an issue for me), but I had some very similar issues corrected by replacing the crankshaft position sensor. My Beetle went from a hair pulling stressful car to nice well behaved fun machine by simply replacing that crankshaft position sensor.

Good luck on your problem.
 

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Discussion Starter #5
So found out why my bug is not running.... my timing belt is broken. Good news is its only going to cost me $400. They still haven't figured out why speedometer is messing up but at least it's running again.
 

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Glad to hear; you found the problem and that there wasn't major damage, like bent valves! :) Once, you get the car back and on the road, you might see if you can do some testing and scan the car with a VW compatible scan tool. This should help; you narrow down the speedo problem and you can decide what to do, from there.
 
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