Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 05-27-2021, 06:28 PM   #23
Registered User
 
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,309
Cris,
Your P1128 and P1130 codes are telling you that the fuel system on both banks has reached the rich limit trigger point. So your fuel trims should be showing negative trims or taking fuel away. Your P0455 is as you know a fuel tank ventilation major leak.
So what is happening is you have a situation where fuel fumes from the fuel tank are coming into the intake from the EVAP system.
Causing hard starting when hot and most likely the P1128 and P1130 codes

Because of the above condition when the car is hot or warm it has trouble starting because the fuel mixture is to rich.
When you step on the gas pedal the reason that it helps is because you are giving the engine more air not more gas. Thus leaning the fuel mixture in the cylinders out and allowing the engine to start.

On a car with electronic fuel injection the ECU controls the fuel.
All that happens when you step on the gas pedal is the throttle plate opens farther allowing more air in and also the throttle position sensor tell the ECU/DME the throttle plate position.

Last edited by blue62; 05-27-2021 at 06:31 PM.
blue62 is online now   Reply With Quote
 



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 12:49 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page