 FUEL CUT, Any advice would be appreciated |
  Jul 30 2004, 08:32 PM
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 Info Seeker  Group: Members Posts: 75 Joined: 29-April 04 From: Crystal Lake, IL Member No.: 284  |
if anyone can help i have a 91 awd auto with a fresh eng rebuild (mostly stock just bored .020 over), a walbro 255, and a new 14b. i was getting what i think was fuel cut between 2500 and 3200 RPM's unless i really feathered it.
 i dont have an mbc but i'm going to make a homemade one just so i can turn it down. but anyways i tried replacing the inj. with used stock 5spds (450's) but it turned out the car wouldn't hardly run is there a chance that i'm getting to much fuel and just need a fpr and afc? i really don't have the money for any of that yet i just want it to be a daily driver at least for a couple more months. ps anybody remotely close to mchenry county i would love someone to take a look and give me an educated decision on what to do because i'm stumped. 
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Jul 31 2004, 02:03 PM
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 Post Master Group: Members Posts: 972 Joined: 30-October 02 Member No.: 34 |
QUOTE (smrtkd69 @ Jul 31 2004, 02:32 AM) if anyone can help i have a 91 awd auto with a fresh eng rebuild (mostly stock just bored .020 over), a walbro 255, and a new 14b. i was getting what i think was fuel cut between 2500 and 3200 RPM's unless i really feathered it. i dont have an mbc but i'm going to make a homemade one just so i can turn it down. but anyways i tried replacing the inj. with used stock 5spds (450's) but it turned out the car wouldn't hardly run is there a chance that i'm getting to much fuel and just need a fpr and afc? i really don't have the money for any of that yet i just want it to be a daily driver at least for a couple more months. ps anybody remotely close to mchenry county i would love someone to take a look and give me an educated decision on what to do because i'm stumped. Not sure where to start here: A MBC won't let you turn the boost down any further than the wastegate. If you want to run low boost, just hook up a boost source directly to the wastegate. That's as low as you can go. Fuel cut: Isn't really from not enough fuel. It's the ECU seeing too much airflow, freaking out and then cutting you off. Injectors: Running 450cc injectors on an auto ECU is going to be a bad idea. Bascily the ECU will fire them just like your stock injectors but you'll end up dumiping ~15% more fuel and drowning things out. Best bet is going to be to test for intake/boost leaks and then log the car. -------------------- |
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Posts in this topic
smrtkd69 FUEL CUT Jul 30 2004, 08:32 PM
ncgalant Its not fuel cut. You can't push through fuel... Jul 30 2004, 09:49 PM JMoushon Also, double check your plug gaps, and make sure y... Jul 31 2004, 06:10 AM xian 1g give a description of your symptoms. Jul 31 2004, 10:24 AM
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