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Fuel Running very rich after installation of Pettit ECU

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Old 07-09-02, 04:27 PM
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Fuel Running very rich after installation of Pettit ECU

Anyone else having this problem...just curious because i love the way the car is running. Now maybe if i yank my cats i can shoot flames!! hehe
Old 07-09-02, 05:10 PM
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Question

What are your mods?
Old 07-09-02, 08:49 PM
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Street Ported w/3mm seals
N-Tech Downpipe
PFS Cat-back
M2 Trailing Arms
M2 Control Arms
Pettit Cool Charge II Intercooler
N-Tech Cold Air Intake
N-Tech BMK
Pettit Unlimited ECU
Greddy Profec B
Silicon Vacuum Lines
PFS Boost Gauge
M2 Willwood Big Brake Kit
Reduced Ratio 5th Gear
Pettit Short Shifter
M2 30% Stiffer Pressure Plate
M2 AST Elimination
M2 Competition Radiator
Magnecore 10mm Wires
Bonez High Flow Cat
Greddy Pulley Kit
Enfini Y Pipe
Unobtainium Bushings

and thats it... dont know why im running so rich... is there a way i can tone it down a bit
Old 07-09-02, 08:50 PM
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its a 93 R1 by the way
Old 07-09-02, 09:13 PM
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These guys said they will mod the maps on an upgraded oem ecu for $150.

http://www.technosquareinc.com/dealer.htm

Woud be best to have some wide band dyno runs 1st.

I think both pettit upgrades are same, except the unlimited boost in the one.
Old 07-09-02, 09:33 PM
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You will run richer with the Pettit ECU than the stock ECU. Are you saying the car is running too rich? If so, how are you measuring your A/F ratio?
Old 07-10-02, 09:37 AM
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Havnt really monitored it in any way just yet.. but it smokes at start up, its got that stench to it a bit when i drive it. The tip of my Cat-back is black after like a week of driving, Its got a bit of backfire a bit too..but i think thats the Cat, I think i need a new one. You think maybe an ApexAFC would be a good investment?
Old 07-10-02, 10:08 AM
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Originally posted by RotorMotorRX7
Havnt really monitored it in any way just yet.. but it smokes at start up, its got that stench to it a bit when i drive it. The tip of my Cat-back is black after like a week of driving, Its got a bit of backfire a bit too..but i think thats the Cat, I think i need a new one. You think maybe an ApexAFC would be a good investment?
Sounds about normal. As I said, you'll run richer with the Pettit ECU.

For me though, my car used to backfire a lot and smoke quite a bit when first starting up. I had a gas odor problem that I was fixing, so while I had everything apart I also cleaned out my UIM and throttle body with some carb cleaner.

I was also replacing my spark plug wires at the time and found out that one of my leading coil wires had fused itself into the coil. I replaced the leading coil and then used dielectrical grease on both ends of the spark plug wire connections when I put them on.

Now, my car almost never backfires and there is barely a puff of smoke at start up.

Also, when as the last time you changed your spark plugs or O2 sensor?
Old 07-11-02, 09:18 PM
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Originally posted by Mahjik


Sounds about normal. As I said, you'll run richer with the Pettit ECU.

For me though, my car used to backfire a lot and smoke quite a bit when first starting up. I had a gas odor problem that I was fixing, so while I had everything apart I also cleaned out my UIM and throttle body with some carb cleaner.

I was also replacing my spark plug wires at the time and found out that one of my leading coil wires had fused itself into the coil. I replaced the leading coil and then used dielectrical grease on both ends of the spark plug wire connections when I put them on.

Now, my car almost never backfires and there is barely a puff of smoke at start up.


Also, when as the last time you changed your spark plugs or O2 sensor?
Spark plugs, wires, o2 an fuel filter were all changed yesterday, backfire has stopped, thanks man!!
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