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Discussion Starter · #1 ·
Slow acceleration on new beetle. New MAF. It has sloww acceleration till i push the gass all the way then it kinda downshifts and moves / accelerates faster.

I have my codes here . Please help i need this care to run the full 150 hp
 

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I would start with a fresh scan and post any codes, code numbers not descriptions.

As for the maf; what is the part number and what brand did you buy? A high quality Bosch maf; is recommended, many aftermarket version do not perform correctly and cause drivability problems. Since, this is a variable you just changed; you might reinstall the old one and see if that helps your problem. Reading live data from the maf and comparing the two; would be a good idea.

Otherwise with 1.8T sluggish drivability and surging issues; tend be related to the boost control systems, not working correctly and boost/vacuum leaks, are usually the culprit. Diverter and other boost valves; are typically worn, in soft failure mode and it is recommended to try testing them using factory service procedures. Read more here:

http://newbeetle.org/forums/1-8-lit...sch.html#/forumsite/20963/topics/50602?page=1

Here is another thread with similar issues:

http://newbeetle.org/forums/showthread.php?t=127410

Scan the car, post up the codes, swap the maf and check out your boost valves and any vacuum leaks. We can go from there... Thanks!


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Discussion Starter · #3 ·
My codes,

These are my codes after cleaning throttle body. new BOSCHE MAF New sparkplugs and new top cover engine gasket seals.
 

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You have a TON of codes! How long; has it been, since you did a scan? If it has been a long time; these could have built up over the years, you could clear them and see what comes back. You have quite a few codes; that are directly related to the boost control system, these could be directly related to your sluggish drivability problem. At a beginning point; I would make sure, your charging system is working correctly (e.g. battery, alternator, wiring, etc.). If you have a low voltage issue; it can cause, all the computers to freak out and throw ton of codes, as they cannot work correctly with low voltage.

16502/P0118/000280 - Ross-Tech Wiki

17965/P1557/005463 - Ross-Tech Wiki

18010/P1602/005634 - Ross-Tech Wiki

P1357 VOLKSWAGEN Ignition Circuit Cylinder 1 Short to Ground | AutoCodes

P1366 VOLKSWAGEN Cylinder 4 Ignition Circuit Short to Ground | AutoCodes

P1360 VOLKSWAGEN Ignition Circuit Cylinder 2 Short to Ground | AutoCodes

16795/P0411/001041 - Ross-Tech Wiki

16622/P0238/000568 - Ross-Tech Wiki

P1363 VOLKSWAGEN Cylinder 3 Ignition Circuit Short to Ground | AutoCodes

P1225 VOLKSWAGEN Injector Circuit Cylinder 1 Short To Ground | AutoCodes

P1227 VOLKSWAGEN Injector Circuit Cylinder 3 Short To Ground | AutoCodes

http://wiki.ross-tech.com/wiki/index.php/17843/P1435/005173

17829/P1421/005153 - Ross-Tech Wiki

P1289 VOLKSWAGEN Turbocharger Bypass Valve Short To Ground | AutoCodes

18057/P1649/005705 - Ross-Tech Wiki

For the boost related valves; you could test them and make sure, you do not have any boost leaks or disconnected hoses.

Here are the service manual pages; to test the different valves: (N75, N249, etc.)

locations:

http://workshop-manuals.com/volkswa...ntrol_module/component_information/locations/

testing:

http://workshop-manuals.com/volkswa...turbocharger/component_information/locations/
 

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Ok, so which boost trouble code is it? Please, post the codes; not descriptions, this removes any possible confusion and we are on the same page, thanks. Then, I would start looking at the definition; on the ross tech wiki and start testing that problem/valve, based on the service manual procedures.
 

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