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| skipmyles | ninth injector | ||
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Guru Newb
 
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hello
on my 85 when first cranked it will idle up to about 1300 rpm even when it gets to oper temp have to turn off then restart it will idle at 650 what cuts the warm up mode off is it the temp sensor at the front of block or what |
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Posted on: 2011/8/2 21:48
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| vetteoz | Re: ninth injector | ||
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Senior Guru
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Quote:
Warm up parameters are fixed in the ECM tune CSI ( 9th injector ) only gets power and operates when the engine is cranking over CSI switch is to left of the CTS sensor ( temp to ECM ) shown circled [IMG]http://i171.photobucket.com/albums/u309/vetteoz/electrical/Image1-3.jpg[/IMG] |
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Posted on: 2011/8/3 0:01
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| bogus | Re: ninth injector | ||
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Grand Imperial Pooh-Bah
 
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it sounds like the Idle Air Control is sticky or needs adjusting. It should kick down after reaching op temp.
The 9th injector only fires when REALLY cold... It's summer, so I would be shocked if it was actually being used now. Think of the 9th injector as being the enrichment circuit on a carb. The temp sensor does control this, but if the IAC or TPS (Throttle Position Sensor) decide to freak out, then all bets are off. Do you have the Helm Factory Service Manual? IF not, check eBay, because folks are selling them on CD for $15~$25, versus over $100 for paper. |
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Posted on: 2011/8/3 0:17
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| skipmyles | Re: ninth injector | ||
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Guru Newb
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have a new iac and have cleaned tb have set iac and tps plus timing have pulled neg cable and car runs great except when first cranked after shut down idles fine may pull iac and check length but it should be clean was wondering how long it took the ecm to learn new settings
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Posted on: 2011/8/3 1:09
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| bogus | Re: ninth injector | ||
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Grand Imperial Pooh-Bah
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the ecm for 1985 is rather crude... slow to say the least. I can't estimate how well it will learn.
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Posted on: 2011/8/3 4:52
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| Matatk | Re: ninth injector | ||
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Webmaster
 
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What method did you use to reset the IAC and base idle?
Matthew |
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Posted on: 2011/8/3 11:48
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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