Question about 2000 Volkswagen Beetle

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1999 beetle hesitates or loses half its power during acceleration2000 Jetta GLS Stumbles on Start/Accelleration

I have a 1999 Beetle and 2000 Jetta. Both 2.0. My 2000 Jetta has had a slow buildup of a problem with starting and stumbling on acceleration. It is most apparent when I've stopped someplace to run in for 5-10 minutes. I come back out to a car that just won't start/behave confidently. I'm almost 99.9% sure this is an ignition coil problem. Check engine light is on but I think that is related to an airflow problem I discovered today. Recent work (like in the past 2 days) 1) Checked the wires and replace the plugs 'just for the heck of it' 2) Fuel pump whirrs like a kitten 3) gasket on gas cap good 4) Ran some fuel injection cleaner through the system (still in progress) 5) Battery and starter very recently checked.. ok there 6) Oil, oil filter (gaskets checked) and air filter replaced just because I was doing all the other stuff anyway. 7) Power steering fluid was low.. addressed that. Here's where it gets interesting. When I pulled the air filter on the 99 Beetle today I neglected to notice the the last mechanic didn't clamp the intake on the manifold end. I also didn't notice it slide off. So on first run around the block after the oil change of course it was getting too much air and dying on acceleration. I fixed that and started thinking how similar the sluggish action was to the Jetta. As I started a teardown of the airflow I pulled the breather hose on the Jetta only to find it completely gummed up with 'creamed coffee'. So there is a moisture problem there. Water+Oil+Air+Heat = milky sludge. I am doubtful of headgasket/coolant issues (which I have heard can make the same colorful beverage) as my coolant level is and has been rock steady. I spent a few hours on cleanup. I tore down the oil fill, breather, air intake and cleaned the intake of the manifold, removing all 'creamed coffee.' I should point out that none of the sludge was in the manifold, nor had it made it's way past the oil fill as far as I could tell. At least 90% of the gunk was in the breather with a slight amount leading to the oil fill. Only some residual was in the air intake itself. The oil change revealed nothing out of the ordinary. So.. all back together... car fires up immediately.. let it warn a bit then it acts very healthy on a few spins around the block. Feels like it is supposed to. Back in the driveway, shut it down, wait 1-2 minutes start up.... problem is back again (no creamed coffee.. the acceleration problem is back) The car seems to struggle mostly between 8 and 10 RPM in this state. If I let it drop below 10 and pop the gas it'll doubt taking action. Once the car has sat for a bit it idles steady right at 10. It always hesitates on first acceleration and only after a block or two does it act normal until the next time I've shut down and start the cycle over again. There is also a very noticeable relationship between steering, acceleration, and creating even more hesitation. In fact just sitting in the driveway in the 8-10 range I can wait for it to fluctuates in the lower part of the band, turn the wheel and touch the gas and the car acts like it may just shut down but then springs to life. So... where should I look next? If it is the ignition coils, any diagnostics I can perform with standard tools/meters to make sure before I plunk down the cash? My 1999 beetle hesitates or when accelerating feels like all or say half the power is gone mostly noticable in 2nd gear the engine lite came on amber lite then went out and over 4mths its been getting worse until now lite is on solid and hesitation is in all gears basic stuff I've done plugs air filter checked intake ducting for leaks cleaned MAP sensor changed oil/filter best fuel system cleaner added to fuel please provide any advice and related experience thank you

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I am having same issues with my 01 1.8T I've replaced maf meter with new one from parts store :( Could it be speed sensors or bad plugs?

Posted on May 01, 2013

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Try driving it with the MAF unplugged and see how it runs. As for the Jetta, VW has release a service bulletin on the oil in intake problem. But I can't remember every thing in the bulletin. I'll have to look it up.

Posted on May 31, 2009

  • Clint Smock
    Clint Smock May 31, 2009

    Try driving it with the MAF unplugged and see how it runs. As for the Jetta, VW has release a service bulletin on the oil in intake problem. But I can't remember every thing in the bulletin. I'll have to look it up.

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