TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Just picked up an 89 RS 305

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Old May 11, 2007 | 08:23 PM
  #1  
JBeezy53's Avatar
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From: Sacramento
Car: 89 RS
Engine: 350 TBI
Transmission: T-5
Just picked up an 89 RS 305

Just picked this up on a good deal. Its pretty much completely stock w/ a T-5 and about 190K miles. The car idles up and down between.....I'd say...... 700-1500 rpms for about 30 seconds or so then idles steady at 750. It idles there with no problems. But when driving if I put it in nuetral or push in the clutch it will idles at 1500 rpms until I come to a complete stop and then it will go back to a steady 750.

I was just wondering if this way a common problem and what I could do to fix it.
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Old May 13, 2007 | 08:10 PM
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JBeezy53's Avatar
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From: Sacramento
Car: 89 RS
Engine: 350 TBI
Transmission: T-5
Re: Just picked up an 89 RS 305

Anyone want to help out the newbie?
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Old May 14, 2007 | 01:11 AM
  #3  
RFmaster's Avatar
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From: OC CA
Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"
Re: Just picked up an 89 RS 305

JB

With 190 k I would start with usual stuff, and also check for vac leaks around TBI. Clean IAC valve and cavity. Check if TPS is worn out (flat spot, etc). Get a scanner (or WinALDL), see what ECM does.


//RF
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