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Old 03-31-2010, 03:06 PM   #1
Ole
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Default Idle problems after inj swap

Probably some noob questions here, but after some hours of reading I am not getting closer.

Here is how I got into my problems:

-Removed Vortec and checked that the car was ideling fine with the 1.8 injectors

-Installed the MSPNP and adjusted timing. Smoooth Idle!
-Welded in the IAT bung and removed AFM, new firmare. Still smooth idle

-Then installed my Rx7 550 injectors and made the following changes on REQ_fuel, Acc Wizzard and crank settings:

Rec fuel set to 5.6 after using the rec_fuel function in megatune

Crank PW (Based on 230-550 calculations):

-40f 4.2
-20f 4.0
0f 3.8
20f 3.6
40f 4.0
60f 3.7
80f 3.2
100f 2.6
130f 2.1
160f 1.8


The accelerationwizard hawe not been touched from base map since I am just trying to get the car to idle smooth before I am driving it. The Acceler Wiz is for compensating when you hit the throttle right?

After the 550 install the car idles like its only running on 2 or 3 cylinders...

Have I done any realy bad settings or are the reconditioned 550s i bought with flow sheet from osidetiger.com just not working?
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Old 03-31-2010, 03:52 PM   #2
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Subscribed...I've got the exact same issue.
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Old 03-31-2010, 03:55 PM   #3
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If you changed the settings as you're supposed to it should be fine. It sounds like a possible vacuum leak at the injectors, they may not have sealed against the cylinder head.
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Old 03-31-2010, 04:07 PM   #4
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Quote:
Originally Posted by RotorNutFD3S View Post
If you changed the settings as you're supposed to it should be fine. It sounds like a possible vacuum leak at the injectors, they may not have sealed against the cylinder head.
Man, I hadn't even thought of that.

Mine acts like it's running on 2-3cyl at anything below about 10% throttle load, including idle and light highway cruising.

As soon as I roll into gas to accelerate, or hit a hill which ups the load, it runs smoothly.

Takes off like a scalded dog in boost.
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Old 03-31-2010, 04:18 PM   #5
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What do the AFRs look like? I swapped rx7 460s with cleaned rx7 460s and that was enough to require reworking the lower duty cycle parts of the map. I wouldn't say it was idling rough, but it was oscillating like crazy at idle, running lean, and generally not very fun to drive.
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Old 04-01-2010, 04:23 PM   #6
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My wbo2 sensor not quite good at the moment, I am getting a new sensor for my zeitronix tomorrow... I tried to idle the car again today, it ran a little bit better...

A new question, if you change some settings in the map, and then are going to press burn to ecu, do to have to shut the engine down? Or can i tune and save the settings with the engine running?
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