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CEL light - diagnostic code P1128?

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Old 04-27-2007, 02:59 PM
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Ramp
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"Spray liberally with carb cleaner and make sure that the window inside it pivots freely.

Jim[/QUOTE]

Jim/anyone: I have it apart - there seems to be alot of black soot inside.

1. The window does not pivot freely, after I clean it, should it move open/closed simply by moving the unit, or should it still need to be moved w/ a small item.

2. Can I spray carb cleaner into the throttle body ?? Or is this a big no no. Not sure how else to clean it out without removing the entire thrtle body and hand cleaning - larger project for another day.

TIA
Old 04-27-2007, 04:23 PM
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Tippy
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Carb cleaner works great to find vacuum leaks but I dont spray it all over the P-car with all of its plastic like I used to on the old Camaros I owned. Propane sounds better for our cars but I have never used propane, does it rev the engine as much as carb cleaner? I would think it would not since it is not as volatile.
Old 04-27-2007, 06:54 PM
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viper501
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Pulling the throttle body is not difficult. I did it, cleaned the IAC valve, and replaced it in my driveway one evening. Took a total of about an hour.
Old 04-27-2007, 07:36 PM
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99firehawk
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Originally Posted by Ramp
How else do you determine if there is a vac leak setting off the CEL ?

first you need to ckech your tra numbers and see if they show you as 2 rich or 2 lean, then if you have a vacum leak you go from there, i perfer using smoke from an evap machine but outside of the shop use a vacum guage
Old 04-27-2007, 07:45 PM
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Just cleaned the IAC valve and part of the plenum that I could reach - filthy black soot - at some point I'll have to go back and take off the entire throttle body and give it a good cleaning - In the interim, after I started back up she was almost stalling when I gave it any gas. I massaged her up and after a run around the block and some rpm's, she's running smooth. Will have to wait to see if the CEL comes back

I think I'm going to add some injector cleaner next time I'm close to empty - probably by tomorrow night.

99firehawk - This is new to me but I'm somewhat handy - "outside of the shop use a vacum guage" - I'll get a vac gauge - where exactly would I hook it up and what readings should I be looking for.
TIA
Old 04-27-2007, 07:59 PM
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sparks259
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i beleive that chevron techron is the only injector cleaner that porsche mentions.
Old 04-28-2007, 12:18 AM
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99firehawk
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Originally Posted by Ramp
Just cleaned the IAC valve and part of the plenum that I could reach - filthy black soot - at some point I'll have to go back and take off the entire throttle body and give it a good cleaning - In the interim, after I started back up she was almost stalling when I gave it any gas. I massaged her up and after a run around the block and some rpm's, she's running smooth. Will have to wait to see if the CEL comes back

I think I'm going to add some injector cleaner next time I'm close to empty - probably by tomorrow night.

99firehawk - This is new to me but I'm somewhat handy - "outside of the shop use a vacum guage" - I'll get a vac gauge - where exactly would I hook it up and what readings should I be looking for.
TIA


the first thing you need to do is get your fra numbers and post them, you may be chasing a vacum leak that doesnt exisit, 1128 could be a lean or rich condition
Old 08-17-2007, 12:17 PM
  #23  
996 AERO
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What does one do for rich or lean condition??
Old 08-17-2007, 01:48 PM
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C4CRNA
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If you're too rich, you take it to the dealer.If you're lean, go by the posts here and save your money!!
Old 08-17-2007, 08:58 PM
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99firehawk
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Originally Posted by 996 AERO
What does one do for rich or lean condition??

you need to figure out which it is and diagnose it from there



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