[jrrnewbeetle]

1998 New Beetle stalled on me about a month ago. Mechanic said he got multiple error codes and replaced the fuel pump. Ran fine for about 3 weeks. In the last week it has started stalling again.
Will start up cold, runs about 10 miles and then "sometimes" stalls again (while running at speed or at a light). Right after the stall the engine will crank but will not start. So far, after about 5-10 minutes will start again and so far has gotten me the 10 miles or so home. Check engine light comes on right after the stall. I read the codes and they are:

P1225-Injector Circuit Cylinder 1 Short to Gnd
P1226-Injector Circuit Cylinder 2 Short to Gnd
P1227-Injector Circuit Cylinder 3 Short to Gnd
P1228-Injector Circuit Cylinder 4 Short to Gnd
P1421-Secondary Air Injector Valve Short to Gnd
P1425-Tank Ventilation Valve Short to Gnd
P1451-Secondary Air Injector Short to Gnd
P1472-EVAP Control System LDP Short to Gnd

Any recommendation on how to start a diagnosis on this? I think it is consistent on the codes it throws.

 

[billymade]

We have seen similar scenarios; where a relay, like the fuel pump relay will kill power to the other components connected to it, thus so many "short to ground" codes.

Another problem we see; is the installation of poor quality aftermarket fuel pumps, these tend to fail and these VW's just won't run right, as they cannot provide the needed fuel volume. We have found, that it seems oem quality fuel pumps; seem to work best, stick with Bosch and VDO for high quality oem fuel pumps.

Bad speed/crank sensors can cause har/no start conditions but typically throw a relayed trouble code,when failing.

Throttle valaves/bodies, also can be dirty and lose their settings, causing dying and hard start problems. A throttle body cleaning and throttle body alignment; typically fixes that issue.

 

[billymade]

If you decide to replace the fuel pump relay; be sure to buy a genuine vw or oem brand part, as we have seen many aftermarket relays have missing internal components, which causes starting problems.
When you want to look up trouble code definitions; be sure to look at the ross tech wiki: https://www.google.com/search?q=ross+tech+wiki&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari

 

[jrrnewbeetle]

Where's my 409

After reading around on the forum, I decided to look at the fuel pump relay to see it's condition as many people said it can cause the short to ground codes I saw. My 98 beetle was very early, the first week they came out. Looking at the relay panel, I expected to see a 409 relay in position 4 of the panel. Instead I see a small 167 relay which I can't find listed anywhere. Anyone run into this? Is this a fuel pump relay?

 

[jrrnewbeetle]

Solved - I think

It seems, with some of the very first new beetles, they used the #167 Passat fuel pump relay instead of the #409. Since the car had been running for the past 19 years on the #167, I replaced it in kind, even though all the manuals said it takes a #409. Driven it 200 miles now with no stalls or error codes. Hopefully that fixed it.

 

[billymade]

Great! I hope that was the problem; let us know, if you end up having any other issues. Thanks!

 

[esse10]

fuel pump

hope you fixed the problem , but if it comes back you might want to check the fuel pump itself. I also thought it was my fuel relay and wind up being the fuel pump intermittently failing and was getting worst and worst by the week. Easy to replace btw. Get a good quality one off ebay to save $$