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2000 VW Beetle GLS 1.8L
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Discussion Starter · #1 ·
So i bought my beetle in the fall, used. And quickly after buying it I realized that whoever owned it before me did not give a single **** about maintaining it. One of the things I wanted to fix recently was the AC not being cold, so I charged it. It was at 5 PSI, charged it to about 40, and it was great. Compressor ran great, air was cold, perfect for the summer. But now, when I click on the AC, the compressor just surges on and off, revving the RPMs every time it comes on, and the air isn't cold.
So I did some research, and I was seeing a lot of stuff about carbon build up in the system. Specific potential causes for my issue were:
  • idle air control valve
  • throttle body
  • EGR valve
  • clean the intake manifold
Can someone please let me know what the best route of action to take to fix this on these engines would be? And if it is to clean the intake manifold, can you please explain in ridiculous detail how I'm supposed to get to the god forsaken thing? Thanks so much :,))
 

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First, what year, model, engine and trans; does the VW you are working with have?

Also, a good first step; would be to scan for trouble codes and post any you find.


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First why was the maf replaced and what brand is it? We have found oem Bosch; is seemingly the only brand that works correctly.

If the car is running badly; the a/c and drivability issues could be interrelated?

A neglected 1.8T, may take some time, effort; to figure things out, untangle the mess and get things running right.

As to the surging problem; maybe take a video with your phone, post a video to youtube and post a link here? This way; we can see, what you are referring to snd be on the same page? Thanks.


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2000 VW Beetle GLS 1.8L
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Discussion Starter · #6 ·
First why was the maf replaced and what brand is it? We have found oem Bosch; is seemingly the only brand that works correctly.

If the car is running badly; the a/c and drivability issues could be interrelated?

A neglected 1.8T, may take some time, effort; to figure things out, untangle the mess and get things running right.


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I got the code read for me cause I don't have the tool, and that's what they suggested I replace, so I replaced it. And I did the air filter with it cause I saw how gross it was after taking it all apart. I bought one off car parts. Here's the link:
And the engine is running poorly, it struggles to get power at high speeds. I just wanna get it back to normal lol
 

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Well, you are going to need a scan tool; to diagnose and repair your car correctly. Reading trouble codes is the first step and then, viewing live data will help confirm problems, bad parts and after repair changes.

We can discuss the purchase of a scan tool but for now, you can typically rent one at most auto parts stores.

As to the maf, that is a low cost aftermarket part and these have a long history if causing problems. If you have the old original oem vw/Bosch maf; you might clean it with some maf cleaner and reinstall it back on the car. These poor quality mafs, can make the car run horribly and in some cases, make it not drivable and go into limp mode.

Here is the maf cleaner; that i use, available at auto parts stores or Walmart:

CRC MASS AIR FLOW SENSOR CLEANER, 11 WT OZ


Tell us, about the history of the maf trouble code and what it indicated, that meant a replacement was required.


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2000 VW Beetle GLS 1.8L
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Discussion Starter · #8 ·
Well, you are going to need a scan tool; to diagnose and repair your car correctly. Reading trouble codes is the first step and then, viewing live data will help confirm problems, bad parts and after repair changes.

We can discuss the purchase of a scan tool but for now, you can typically rent one at most auto parts stores.

As to the maf, that is a low cost aftermarket part and these have a long history if causing problems. If you have the old original oem vw/Bosch maf; you might clean it with some maf cleaner and reinstall it back on the car. These poor quality mafs, can make the car run horribly and in some cases, make it not drivable and go into limp mode.

Here is the maf cleaner; that i use, available at auto parts stores or Walmart:

CRC MASS AIR FLOW SENSOR CLEANER, 11 WT OZ


Tell us, about the history of the maf trouble code and what it indicated, that meant a replacement was required.


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Ok, so I'll work on getting a hold of a better MAF sensor. I replaced the MAF after getting it scanned and getting suggestions on what to do after talking to mechanic friends, but I don't think it's what is causing the issue. Whenever I accelerate quickly, or "floor it", the rpm's climb incredibly slow and there's this weird "hissing" noise coming from the engine. I figured it was a turbo or some kind of vacuum leak. The car has been doing this since I bought it. I wanna fix as much as I can on my own cause I simply can't afford labor costs right now.
Is there a certain type of scan tool that's best for me to rent? What's the first step I should take when it comes to getting my 1.8 back to normal?
 

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Well, the MAF is a big standout right now as a problem; a bad maf, can make the car run horribly and cause rich or lean codes, etc.

Do you still have the original maf(?); it maybe fine. You might clean it snd reinstall; see if the poor running problem goes away.

If you end up needing a new maf; stick with Bosch oem only, you can look up the right one here:


Buy from a reputable company; as we seem to be seeing Bosch counterfeit parts from China from eBay and Amazon.

Lately, FCPEURO, has been a great VW parts supplier and they offer free shipping, lifetime warranty on everything they sell.

www.fcpeuro.com

As to the scan tool; a vw specific one would be ideal (VCDS, OBDEleven, “VAG” scanner etc).

For now, we need to read some basic info; like trouble codes and live data, for example the maf readings, fuel trim, etc. Any auto parts stores; should be able to rent you a scanner they can read codes and view live data.

If you want to purchase a VW specific scanner; let us know your budget and what you want to have, etc. The investment in a factory VW scanner; will save you money, enable you to diagnose things and complete repairs. Most VW shops and VW dealerships; are over $100 per hour labor rate and so, it doesn’t take much, to pay for the cost of the scan tool, then you have it for future repairs.
 

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2000 VW Beetle GLS 1.8L
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Discussion Starter · #10 ·
Well, the MAF is a big standout right now as a problem; a bad maf, can make the car run horribly and cause rich or lean codes, etc.

Do you still have the original maf(?); it maybe fine. You might clean it snd reinstall; see if the poor running problem goes away.

If you end up needing a new maf; stick with Bosch oem only, you can look up the right one here:


Buy from a reputable company; as we seem to be seeing Bosch counterfeit parts from China from eBay and Amazon.

Lately, FCPEURO, has been a great VW parts supplier and they offer free shipping, lifetime warranty on everything they sell.

www.fcpeuro.com

As to the scan tool; a vw specific one would be ideal (VCDS, OBDEleven, “VAG” scanner etc).

For now, we need to read some basic info; like trouble codes and live data, for example the maf readings, fuel trim, etc. Any auto parts stores; should be able to rent you a scanner they can read codes and view live data.

If you want to purchase a VW specific scanner; let us know your budget and what you want to have, etc. The investment in a factory VW scanner; will save you money, enable you to diagnose things and complete repairs. Most VW shops and VW dealerships; are over $100 per hour labor rate and so, it doesn’t take much, to pay for the cost of the scan tool, then you have it for future repairs.
I don't have the old one, but I think it was a cheap one too. It was replaced before I bought the car, and it looked like the one I bought and put in. But I'll look into scanner, and the better MAF sensor and putting it in
 

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Your MAF sensor, seems to be a bit of a oddball; I'm seeing this VW part # and cross reference with this Bosch MAF sensor but some discrepancies on the Bosch site, as to correct fitment:

VW Mass Air Flow Sensor - Genuine VW Audi 06A906461A


Bosch Mass Air Flow Sensors (63136)


AutohausAZ has a good price:


Their description, includes this:

P/N: 63136 Bosch OEM
Description:
Please verify Bosch part number (0280218002) or VW number (06A906461A) on existing unit prior to ordering - some variations may exist due to VW factory changes. 1 per car.
Cross References:
  • 0280218002
  • 06A906461A
  • 0986280205
  • 30020
  • W01331832620
You might want to confirm the correct part #; by your VIN, you can search on the VW parts site (www.parts.vw.com) or Bosch parts site by VIN (Home - Bosch Auto Parts - Liferay DXP) or call Bosch tech support or your local VW dealer parts dept.

Bosch Auto Part USA: Tech Support:

Phone: 888 715 3616

In North America
8AM - 5PM CST Mon-Fri
 

· Registered
2000 VW Beetle GLS 1.8L
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17 Posts
Discussion Starter · #12 ·
You MAF sensor, seems to be a bit of a oddball; I'm seeing this VW part # and cross reference with this Bosch MAF sensor but some discrepancies on the Bosch site, as to correct fitment:

VW Mass Air Flow Sensor - Genuine VW Audi 06A906461A


Bosch Mass Air Flow Sensors (63136)


AutohausAZ has a good price:


Their description, includes this:

P/N: 63136 Bosch OEM
Description:
Please verify Bosch part number (0280218002) or VW number (06A906461A) on existing unit prior to ordering - some variations may exist due to VW factory changes. 1 per car.
Cross References:
  • 0280218002
  • 06A906461A
  • 0986280205
  • 30020
  • W01331832620
You might want to confirm the correct part #; by your VIN, you can search on the VW parts site (www.parts.vw.com) or Bosch parts site by VIN (Home - Bosch Auto Parts - Liferay DXP) or call Bosch tech support or your local VW dealer parts dept.

Bosch Auto Part USA: Tech Support:

Phone: 888 715 3616

In North America
8AM - 5PM CST Mon-Fri
I was looking at the autohausAZ one! I'll buy that one when I can and install it.
 

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2000 VW Beetle GLS 1.8L
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17 Posts
Discussion Starter · #15 ·
As to the VW scan tools; do you have any scanner at all? What would be your budget, for purchasing one?
Well now the car isn't starting. Again 🫠 it died on me earlier in the week. No electricity. I figured the alternator went. I had it towed to a shop, they tested me alternator and it was fine, but the battery wasn't. Replaced the battery, ran fine, and now it's dead again and I don't have a car
 

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Well if you can get it jump start; then I would drive it to a auto parts store and have them fully test the charging system and see if everything is in spec.


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On my 2002 new beetle turbo S; it had 120 amp Valeo original alternator; I bought a Bosch replacement at AutoZone and it worked out a bit of a tight fit compared to the Valeo but Bosch is OEM excellent quality no issues since then.


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PS: when you go to replace the alternator; remove the passenger side headlight and bracket/basket and you can remove the alternator out that way.


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