No start!
 

While driving home a few days ago the car stumbled a few times and was down on power- didn't want to rev either. Next morning, wouldn't start- turns over fine and a friend can smell fuel at the tailpipe while it's turning over. So, I bought a durametric. Codes are P1133 and 1126. All of the reading here suggests MAF. Today, I looked at all of the fuses and didn't find any blown. The relays in the no. 2 relay block looked good and didn't smell burnt. Why won't it start? Is it flooding itself? Should I unplug the MAF and see if that helps? Help please!

Are these indications of a bad crank position sensor?

Had the coilpack and fuel injectors changed two years ago... very similar symptoms however it didn't happened overnight (more like within a week or so)

Neither code has anything to do with the MAF, they are indicating that your have an overly lean condition on bank 2 (cylinders 4-6). Most common faults are an intake air leak, low fuel pressure, bad injectors or low volume of fuel supply. The two of the last three possible are doubtful as low fuel pressure or volume would affect both banks.

I would start by looking for any possible air leaks that could lean out that bank, but for the sake of elimination would hook up a fuel test gauge to the test port and check both pressure and delivery.

Apparently not.

Wow that must have been expensive!

OK thanks JFP, I'll head in that direction. Any ideas why it won't start?

Consider my fuel pressure and delivery volume test mentioned above.....

What about those $19.99 fuel pressure tester you find in the Auto store, are they compatible with the fuel test port on the 986?

edit above

okay I'll try to buy one that fits today. Thanks

So far I've only located one for $60 and Porsche wasn't included in it's list of
recommended vehicles. My baby's VERY sick- I'm worried.

Not sick, she just had enough of you and taking a break for a few days ;) What I've learn on the 986 is when they are still good enough to throw accurate codes at you, it always ends up to be a small problem.

Once you've slammed in an aftermarket (NEW) fuel pump in it, she'll wake up again. Hoping it's only the FP (overnight failure like this... like JFP said I can't imagine anything else)

Brand New Genuine Fuel Pump for Porsche 911 Boxster | eBay

Once she is running again, slap her good old GF style with one of these :D

T3 T4 Turbo Intercooler Blow Off Valve Fuel Pump Heat Shield Piping Kit | eBay

quick search indicates maf as the general culprit. unplug it and see what happens.

She got me home- now she's REALLY sick- no start! I owe her big time and I'm committed to healing her! And no forced induction EVER- the IMSB will shatter!!!:eek:

What's your source for the de-coding? I've found 3 different charts! It's a little confusing!

The MAF has little impact below 3,500 - 4,000 RPM, it should not impact starting....

fair enough. I just googled the codes and they show up together pretty consistently and seem to almost always point to maf in the results. but yeah, it should still start, unless the trims perhaps are all screwed up or something?

It can impact starting if its shorted out. Although it is unusual.

Id recommend unplugging the sensor and seeing if it fires up.

If that doesnt do it, check for spark, fuel pressure, and injector pulse. If you cant check for injector pulse, a lack of both spark and fuel delivery will be enough to condemn the main relay or the crank position sensor.

The reason you wont see spark of fuel with a bad crank sensor is because the ECU needs to see 150-200 rpm ( cranking ) before closing the relay and sending spark and injector pulse signals....

I'm going to try locating a fuel press. tester today and then I'll also try unplugging the MAF' tonight. I would think that the crank sen. would cost the least.... Thanks for the help folks. It's soon time to put baby away for winter so I'm anxious to get this solved!

l located and bought a generic fuel pressure tester with a Schrader valve fitting on it for $50 and it fits the car. I made a jumper wire to power the fuel pump specifically ( Bentley manual). Gauge indicated no pressure at all but there was battery voltage at the plug for the pump. The pump remained silent. I've pulled it out of the tank and will order a new one when the dealer opens next. Hopefully a new one solves all. Is there anything else I should replace, 'while I'm in there'?

Jeff, I wish that were true, but go check my MAF threads. What I had was no problem on an intial cold start and drive. On a hot restart - after letting the car sit for a while - I would get a no start condition. Engine would crank, start, stumble, stop. All in about 1-3 seconds. Pulling the MAF would allow the car to start and drive off without any noticble perormance issue. Replacing the MAF resolved the problem.

I originally though the issue was a crank position sensor, so I have one in the bag now. JD suggested I pull the MAF as a trial test. Good thing to or I'd still be stumbling aroung repalcing parts looking for a solution. As an FYI this was with a P0102 error though.

Every time I have to fix either fuel delivery, intake issue, replacing MAFs, before tuning, or when the tailpipe blacken, etc etc... I also change my six little sparkplugs as well. Cheap cheap!

Sorry to hear about your FP mate. Hopefully she will take your back on the roads on time before storage

They've only got 18 000 km on them (over 2 years). I hope there's no other prob besides the pump, like a vac leak or MAF. The weathers been poor lately but it's nice now and for the next 5 days or so. I probably won't have the pump in hand for 4 more days. I've only driven baby 6500 km in the last 12 months. It pains me. She needs- I need... I'm going to finish polishing the hood today then glaze and some carnuba wax to protect her.

Suffering catfish! Sunset Porsche wants $418 for a fuel pump AND 3-5 days before THEY get it! Then 1-2 before I get it!:eek: For 15% more they can have it expedited to them overnight. Let's see, I live in a RAINFOREST and there's no rain in the 5-day forecast and the rainy season is about to start and I haven't driven baby for like a week already ( and baby doesn't see rain)....Yep, I did it- it's only money, right?;)

Update
 

Fuel pump came in. It looks EXACTLY like the one pictured on pelican ($263 VDO) and the E-bay example listed by nine8six, above, for $236 ( VDO). I've worked in MFG and know that mfg's can have different standards/ boxes/ labels for the same product but find myself wondering what more I gained by paying Porsche (Sunset) almost $200 more. Learned some stuff while installing it:

1) you have to carefully pre-bend the fuel hoses into a similar shape as the old ones or they'll interfere with the fuel level float. You want them to pass the sending unit on the OPPOSITE side of the float apparatus. I used 2 zip-ties to insure they did this (in Pelican's technical DIY, Wayne noted this as well).

2) the rubber gasket should be placed INSIDE of the tank neck FIRST, then insert the sending unit into it, as you attach the fuel lines and electrical connector.

3) with the vehicle running the gauge recorded 45 lbs

Yep, it's only money you said it right ;)

Glad you are back on the road and it was only the FP. Now go kick the hell out of her for what she did... 45lbs sound like more than enough for that