Fuel for best starting hot
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
-
rodpaslow
- MegaSquirt Newbie
- Posts: 1
- Joined: Thu Mar 10, 2005 8:36 am
- Location: Saskatoon, Saskatchewan, Canada
- Contact:
Fuel for best starting hot
I have a 2.0 16v VW and I can't seem to get it to start easily when the engine is hot. A starting point would help. Should it start better with more or less fuel. Less being 2 ms more being more than that?
°°~°°
Re: Fuel for best starting hot
This has always been an challenging issue, both with carbs and FI.
GM had even went so far as to put a "hot-soak" bypass valve on their carbs back in the 70s-80s.
It was a thermal bimetal spring valve on the lower rear body that would open due to the heat soaked air up by the air cleaner (behind the secondaries on 4BBls) It could flow almost 1/4 of the volume of a primary, so quite a bit of extra air (read lean) for those first several seconds/minute after the trip to the grocery store, ATM or as Lance suggested the gas station.
GM had even went so far as to put a "hot-soak" bypass valve on their carbs back in the 70s-80s.
It was a thermal bimetal spring valve on the lower rear body that would open due to the heat soaked air up by the air cleaner (behind the secondaries on 4BBls) It could flow almost 1/4 of the volume of a primary, so quite a bit of extra air (read lean) for those first several seconds/minute after the trip to the grocery store, ATM or as Lance suggested the gas station.
FLY LOW - GO FAST - TURN LEFT!
http://www.p40warhawk.com/P-40sToday/P-40sToday.htm
http://www.p40warhawk.com/P-40sToday/P-40sToday.htm
Re: Fuel for best starting hot
Mazda uses a small bypass air solnoid to lower fuel pressure on hot start up for 20 seconds to get the hot boiling fuel back to the tank and push fresh gas back in, thats how most oem do it I believe, the ecm compensates for the lowered fuel pressure by increasing the pw slightly.