Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

code 1126 and 1133 story

extrememoto
 Share

Recommended Posts

extrememoto Member

extrememoto

Posted
Posted

2000 C4 Tip, 30,000 Miles, no intake mod.

Sorry, another MAF related issue, I have spent hours reading this forum, but still would like to get some opinion. Here is the story.

About 3,000 miles ago, the CEL came on, 1128 and 1130. Swapped out the MAF, drove perfect for 3,000 miles.

Yesterday, all of the sudden at a red like, the engine stalled and started to drive poorly, but after I let the engine run for about 5 minutes, I was able to get it home however at around 3 to 4k rpm, it feels like fuel starvation, hesitation and stumbles.

Several miles later, the CEL came on, 1126 and 1133. The car drives much better with the CEL on, no power lost at mid range.

After I cleared the CEL, the car drives poorly again, and had to let the engine run for 5 minute before I can take it on the road, once again mid range problem appeared.

Based on what was described, is it the MAF again? I have tried to look for intake leaks, but couldn’t really find one.

Thanks in advance.

Link to comment
Share on other sites
ipb-autosport Member

ipb-autosport

Posted
Posted
2000 C4 Tip, 30,000 Miles, no intake mod.

Sorry, another MAF related issue, I have spent hours reading this forum, but still would like to get some opinion. Here is the story.

About 3,000 miles ago, the CEL came on, 1128 and 1130. Swapped out the MAF, drove perfect for 3,000 miles.

Yesterday, all of the sudden at a red like, the engine stalled and started to drive poorly, but after I let the engine run for about 5 minutes, I was able to get it home however at around 3 to 4k rpm, it feels like fuel starvation, hesitation and stumbles.

Several miles later, the CEL came on, 1126 and 1133. The car drives much better with the CEL on, no power lost at mid range.

After I cleared the CEL, the car drives poorly again, and had to let the engine run for 5 minute before I can take it on the road, once again mid range problem appeared.

Based on what was described, is it the MAF again? I have tried to look for intake leaks, but couldn’t really find one.

Thanks in advance.

extrememoto, have you recently replaced the MAF? this code and the running condition you describe with no detection of a vacuum leak is usually a MAF.

do one test and disconnect the MAF and drive it, see if it runs better.

Let me know, Ron

Link to comment
Share on other sites
  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
2000 C4 Tip, 30,000 Miles, no intake mod.

Sorry, another MAF related issue, I have spent hours reading this forum, but still would like to get some opinion. Here is the story.

About 3,000 miles ago, the CEL came on, 1128 and 1130. Swapped out the MAF, drove perfect for 3,000 miles.

Yesterday, all of the sudden at a red like, the engine stalled and started to drive poorly, but after I let the engine run for about 5 minutes, I was able to get it home however at around 3 to 4k rpm, it feels like fuel starvation, hesitation and stumbles.

Several miles later, the CEL came on, 1126 and 1133. The car drives much better with the CEL on, no power lost at mid range.

After I cleared the CEL, the car drives poorly again, and had to let the engine run for 5 minute before I can take it on the road, once again mid range problem appeared.

Based on what was described, is it the MAF again? I have tried to look for intake leaks, but couldn’t really find one.

Thanks in advance.

I agree with Ron about the MAF.

What air filter do you have? a factory (paper) one or an after market (oiled) filter?

Link to comment
Share on other sites
extrememoto Member

extrememoto

Posted
  • Author
Posted
2000 C4 Tip, 30,000 Miles, no intake mod.

Sorry, another MAF related issue, I have spent hours reading this forum, but still would like to get some opinion. Here is the story.

About 3,000 miles ago, the CEL came on, 1128 and 1130. Swapped out the MAF, drove perfect for 3,000 miles.

Yesterday, all of the sudden at a red light, the engine stalled and started to drive poorly, but after I let the engine run for about 5 minutes, I was able to get it home however at around 3 to 4k rpm, it feels like fuel starvation, hesitation and stumbles.

Several miles later, the CEL came on, 1126 and 1133. The car drives much better with the CEL on, no power lost at mid range.

After I cleared the CEL, the car drives poorly again, and had to let the engine run for 5 minute before I can take it on the road, once again mid range problem appeared.

Based on what was described, is it the MAF again? I have tried to look for intake leaks, but couldn’t really find one.

Thanks in advance.

extrememoto, have you recently replaced the MAF? this code and the running condition you describe with no detection of a vacuum leak is usually a MAF.

do one test and disconnect the MAF and drive it, see if it runs better.

Let me know, Ron

Yes, I did replace the MAF about 3,000 miles ago. I got it new from ebay, perhaps that’s the problem. I will try run the car later with the MAF off.

Can I narrow this problem down to either MAF or vacuum leak?

Link to comment
Share on other sites
extrememoto Member

extrememoto

Posted
  • Author
Posted
2000 C4 Tip, 30,000 Miles, no intake mod.

Sorry, another MAF related issue, I have spent hours reading this forum, but still would like to get some opinion. Here is the story.

About 3,000 miles ago, the CEL came on, 1128 and 1130. Swapped out the MAF, drove perfect for 3,000 miles.

Yesterday, all of the sudden at a red light, the engine stalled and started to drive poorly, but after I let the engine run for about 5 minutes, I was able to get it home however at around 3 to 4k rpm, it feels like fuel starvation, hesitation and stumbles.

Several miles later, the CEL came on, 1126 and 1133. The car drives much better with the CEL on, no power lost at mid range.

After I cleared the CEL, the car drives poorly again, and had to let the engine run for 5 minute before I can take it on the road, once again mid range problem appeared.

Based on what was described, is it the MAF again? I have tried to look for intake leaks, but couldn’t really find one.

Thanks in advance.

extrememoto, have you recently replaced the MAF? this code and the running condition you describe with no detection of a vacuum leak is usually a MAF.

do one test and disconnect the MAF and drive it, see if it runs better.

Let me know, Ron

Yes, I did replace the MAF about 3,000 miles ago. I got it new from ebay, perhaps that’s the problem. I will try run the car later with the MAF off.

Can I narrow this problem down to either MAF or vacuum leak?

The filter is factory paper filter.

Link to comment
Share on other sites
Chuck Jones Member

Chuck Jones

Posted
Posted

I realize that you can find some deals on eBay...but I'd NEVER buy a MAF off of an eBay seller....there are just too many times that guys will take the mods off their cars and sell off the parts....and since a MAF is so critical to the engine running right...I'd only buy it new from a bonafide distributor.

Don't get me wrong...I buy a lot of Porsche things off eBay, especially for my 930...just not the MAF.

Link to comment
Share on other sites
extrememoto Member

extrememoto

Posted
  • Author
Posted
If it runs fine without the MAF then it is highly likely a bad MAF.

yes, drives well with MAF unplugged. so I guess next step is to buy another MAF.

Should I still look for vacuum leaks or the source of the problem since something has to cost the MAF to go bad in the first place?

Link to comment
Share on other sites
  • 2 weeks later...
  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
just got the MAF, installed it, disconnect the battery for 10 minutes. Drove for 15 minutes, CEL came back again, same thing.

What else should I look into?

Thanks

Without seeing the MAF air flow - it would appear that you have an air leak somewhere in the air intake.

The engine is seeing to much air.

Link to comment
Share on other sites
1schoir Member

1schoir

Posted
Posted
just got the MAF, installed it, disconnect the battery for 10 minutes. Drove for 15 minutes, CEL came back again, same thing.

What else should I look into?

Thanks

Extreme:

Have you looked into a possible air leak coming from your oil filler cap, or possibly your oil filler tube?

There is a TSB for the 996 that advises that you will get a CEL if the oil filler cap is loose, not properly seated, or has an o-ring seal that does not provide a complete seal. The fault codes that may result include:

Motronic 5.2: P1124, P1126, P1127, P1128

Motronic 7.2: P1125, P1132, P1127, P1134

I don't know if this second thought would help you at all, but on a 986 Boxster, a cracked oil fill tube can also produce the fault codes that you listed, i.e., P1123 to P1130 for a DME 5.2 and , and P1126, P1128, P1130, and P1133 for a DME 7.2.

Regards, Maurice.

Link to comment
Share on other sites
extrememoto Member

extrememoto

Posted
  • Author
Posted

The oil cap seems to sit tight and I can't see any crack on the oil tube visually.

Is it bad to drive with a bad MAF, could it cause misfire? Yesterday the car had a flashing CEL, code read cylinder misfire, I let it sit over night, disconnect the battery to reset system and it seem to drive fine now.

But whatever it is, I think I better get it fixed asap.

ps. I have the durametric tool, and the RKAT readings are way out of the suggested value from the durametric people. I was told it's most likely a bad MAF, but I am suspicious of other issues.

Link to comment
Share on other sites
  • 2 years later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.