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fuel injection  
bradycorn bradycorn
New User | Posts: 11 | Joined: 09/08
Posted: 09/26/08
07:38 AM

needing some info on getting my buggy running better i put a 350 engine out of a 93 blazer in buggy and used the computer out of blazer as weel as the wiring harness i did not put 02 sensor in buggy exhaust and it floods from time to time and is hard to start i was told i could clear the computer of the need to read this sensor and it would fix it wondering if anyone has ever actually done this before i screw up computer  


 
1986blazer
User | Posts: 239 | Joined: 09/08
Posted: 09/26/08
07:53 AM

it might be the fuel pressure regulator on im assuming the TBI injectors ....................have the presure checked if drops alot in a half hour thats it  


 
bradycorn bradycorn
New User | Posts: 11 | Joined: 09/08
Posted: 09/26/08
04:01 PM

ok thanks i have also found out today that pressure to high will cause a problem to been focusing on sensors but will try fuel system checks thanks alot  


 
SnoMan
Addict | Posts: 5215 | Joined: 05/04
Posted: 09/26/08
07:59 PM

Yes, you want 9.5 to 10 PSI max at injectors plus if ECT is bad or missing mixture can go over rich when engine warms up.  


 
bradycorn bradycorn
New User | Posts: 11 | Joined: 09/08
Posted: 09/27/08
07:28 AM

thanks alot for info that is excatly what it does it starts fine cold but after i shut it off it will be flooded and hard to start sometimes but not always i had a wiring harness made from the original one but none of the sensors are hooked up anymore was told it would run fine that way but finding that is not the case sometimes it starts and runs and idles perfect other times it wont hardly idle and runs way to rich but usually only for a few minutes then it will run fine until you shut it off  


 
ERIC6
New User | Posts: 7 | Joined: 09/08
Posted: 09/27/08
12:32 PM

i just did the same conversion on my plow trk i was having the same issues i ended up having to install a factory fuel pump and tank to solve my problem aftermarket pumps where causing me a headache  


 
SnoMan
Addict | Posts: 5215 | Joined: 05/04
Posted: 09/27/08
04:26 PM

If it generally runs well cold and bad hot this suggests missing or bad ECT sensor. It is located right next to thermostat housing cover.  


 
bradycorn bradycorn
New User | Posts: 11 | Joined: 09/08
Posted: 09/28/08
07:52 AM

again thanks alot guys for info i appreciate it a bunch i did use original fuel tank and pump that came out of donor vehicle have checked fuel pressure and it stays around 12 or 13 pounds so i am betting it is a sensor problem as there is none hooked up on this engine i am looking into building me another wiring harness that will utilize all the sensors and go from there if i can stop wheeling with it long enough to work on it that is thanks alot guys   brady  


 
SnoMan
Addict | Posts: 5215 | Joined: 05/04
Posted: 09/28/08
08:49 AM

Typically the fuel pump is 14 to 17 PSI and there is a regulator on back of TBI unit that keeps it at 9.5 to 10 PSI max. If pump is only 12 to 13 PSI you have a problem brewing and could result of loss of fuel flow and leaning out under high demand. The higher line pressure and regulator assures good flow with good pressure regulation for injectors.  


 
bradycorn bradycorn
New User | Posts: 11 | Joined: 09/08
Posted: 09/28/08
08:34 PM

thanks alot guys really helped out i have to go back to work will not be able to mess with it for a month thanks again plus have to replace locker in front of wifes jeep first thing when i get home then can resume on buggy  


 
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