Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
SVTPerformance's Chain of Restaurants
Tuning À la carte
Tuning Help! New blower, HPX....
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="03Steve" data-source="post: 13392919" data-attributes="member: 5016"><p>I think you have quantified the PW issue very well. </p><p></p><p>-560-600 inj pw with the MAF plugged in</p><p>-260 inj pw with the MAF unplugged</p><p>-210 A/D counts from the MAF at idle</p><p>-~1VDC output from the MAF at idle (1VDC * 204.6 = 204.6 A/D counts)</p><p></p><p></p><p>It seems that the PCM is telling the injectors what to do. That is quantified with the unplugging of the MAF. The SD 80s aren't at fault when the PCM is cutting injector pulsewidth by over 50% when the MAF is unplugged.</p><p></p><p>One thing to consider...the minimum pulsewidth scalar. I don't have the source code for the AOL3, so I cannot verify if injector minimum pulsewidth only applies with a MAF that is in an operational state. But you can lower it. To zero. Just to test. Nice having the software to test, isn't it?</p><p></p><p>You can put up a screen shot of your base fuel table if you like. Low load and low RPM (bottom left part of table) values are typically 1.00. You can also verify that your Stoich Air/Fuel ratio scalar is set to 14.64 (100% gasoline) or 14.08 (90/10 gasoline/ethanol). </p><p></p><p>To answer your question, yes...you can still correct the transfer function. As long as there is nothing radical going on in the base fuel table, that is a good place to typically start.</p><p></p><p>Curious, have a photo of the location of the sensor and bypass valve? Centri setups can be touchy with hardware placement...</p></blockquote><p></p>
[QUOTE="03Steve, post: 13392919, member: 5016"] I think you have quantified the PW issue very well. -560-600 inj pw with the MAF plugged in -260 inj pw with the MAF unplugged -210 A/D counts from the MAF at idle -~1VDC output from the MAF at idle (1VDC * 204.6 = 204.6 A/D counts) It seems that the PCM is telling the injectors what to do. That is quantified with the unplugging of the MAF. The SD 80s aren't at fault when the PCM is cutting injector pulsewidth by over 50% when the MAF is unplugged. One thing to consider...the minimum pulsewidth scalar. I don't have the source code for the AOL3, so I cannot verify if injector minimum pulsewidth only applies with a MAF that is in an operational state. But you can lower it. To zero. Just to test. Nice having the software to test, isn't it? You can put up a screen shot of your base fuel table if you like. Low load and low RPM (bottom left part of table) values are typically 1.00. You can also verify that your Stoich Air/Fuel ratio scalar is set to 14.64 (100% gasoline) or 14.08 (90/10 gasoline/ethanol). To answer your question, yes...you can still correct the transfer function. As long as there is nothing radical going on in the base fuel table, that is a good place to typically start. Curious, have a photo of the location of the sensor and bypass valve? Centri setups can be touchy with hardware placement... [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
SVTPerformance's Chain of Restaurants
Tuning À la carte
Tuning Help! New blower, HPX....
Top