Muscular Mustangs

Muscular Mustangs (https://www.muscularmustangs.com/forums/index.php)
-   5.0L Tech (https://www.muscularmustangs.com/forums/forumdisplay.php?f=7)
-   -   NEED HELP (https://www.muscularmustangs.com/forums/showthread.php?t=1018)

1991MUSTANGGT 12-28-2008 10:59 PM

NEED HELP
 
PUT SOME 110 RACING GAS IN YESTERDAY CAR WAS RUNNING FINE TO GET IT PUT LIKE 40% IN THE CAR CAME HOME CAR WAS STILL OKAY WOKE UP THIS MORNING TO WARM IT UP CAR BACK FIRED ON ME WOULDNT STAY CRUNK LIKE IT HAD A LATE REACTION WHEN I PUSH THE GAS TO GET IT TO CATCH IDLE BUT IT KEPT BACK FIRING ANY IDEA'S

quick5pnt0 12-28-2008 11:31 PM

First thing i'd do is fill it up with regular gas to see if that improves things.




Beechkid 12-29-2008 07:17 PM

Re: NEED HELP
 
Quote:

Originally Posted by 1991MUSTANGGT
PUT SOME 110 RACING GAS IN YESTERDAY CAR WAS RUNNING FINE TO GET IT PUT LIKE 40% IN THE CAR CAME HOME CAR WAS STILL OKAY WOKE UP THIS MORNING TO WARM IT UP CAR BACK FIRED ON ME WOULDNT STAY CRUNK LIKE IT HAD A LATE REACTION WHEN I PUSH THE GAS TO GET IT TO CATCH IDLE BUT IT KEPT BACK FIRING ANY IDEA'S

IIRR, the 91 4.6 was a pretty low compression (9-1) engine and what can happen with racing fuel in a stock engine is there is not enough compression/cylinder pressure to make the fuel burn- the higher the octane shifts the ignition temperature higher than 91 octane fuel. With hte mix of 91/110 you were probably at around 100 but after the refill you were probably raised just above the limits. I would drain what I could, add a pint of acetone to the tank and fill with 87.

1991MUSTANGGT 12-30-2008 11:35 PM

I HAVE A 1991 MUSTANG 5.0 I HAVE GT 40 HEADS GT40 UPPER LOWER INTAKE E-303 CAM 70MM THORTLE BODY 24 LB INJECTORS AND MORE I GONE TRY TO DRAIN GAS TOMORROW


All times are GMT -4. The time now is 03:05 AM.

Powered by vBulletin® Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.

 
For the best viewing experience please update your browser to Google Chrome