[AT] Any Chevy TBI experts

[Cecil Bearden]

It was the EGR valve....
I checked it with the OTC 2000, and did not have any codes, and everything 
looked fine on the data stream.  So, used the old fashioned way.  Pull off a 
line and see if it made any difference.  Sere enough it was the EGR.   Put 
the line back on and it worked fine.  Must have been stuck or something...

Had to cahnge the transmission fluid, and found a "string" wound around the 
left CV joint boot.  Could not cut this string with my knife except one 
strand at a time.  It looked like horse hair!!!!!!
Parts house guy said it was a deep sea fishing line that had a fine cable in 
it.  IN OKLAHOMA???!!!!

Never fails, spent 4 hours putting these on about a year ago...   Can't get 
the new one until noon today.  NAPA is closed, O'Reilleys has it in their 
warehouse, and Autozone carries the same line of boots, but does not carry 
that number!!!!!!!!!!!

Crazy

Cecil in Okla
----- Original Message ----- 
From: "ken knierim" <wild1 at cpe-66-1-196-61.az.sprintbbd.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Saturday, November 05, 2005 2:26 PM
Subject: Re: [AT] Any Chevy TBI experts


> On Sat, 2005-11-05 at 00:06, Cecil Bearden wrote:
>> This is for my tractor hunting vehicle.....
>>
>> I have an 89 chevy 4wd 3/4 auto w/ TBI..    at light load, either 
>> starting
>> out, or running at 30-40 mph the engine surges.  It drives me nuts.  Has
>> anyone had this problem or knows how to solve it.  I have looked at 
>> several
>> statements about this on the internet, and according to what I read, it
>> could be a 2 week chore testing everything that it could be.  I do have a
>> on-board tester for it, but I have never had any codes show up....
>>
>> Cecil in OKla
>>
>
> Try the simple stuff first... cap, rotor, plugs, plug wires... that
> seems to fix a lot of things. After that, the next most likely culprit
> would be the throttle position sensor... those seem to fix all kinds of
> troubles on my '88 Camaro 305 TBI.
>    I also had a really freaky one with the electronic spark control on
> my '86 Blazer. There was some noise in the driveline that would show up
> coming off a light and it would get picked up by the knock sensor,
> causing a huge stall and surge as it retarded and advanced the timing.
> Replaced the knock sensor, went through about everything, finally ripped
> out the knock sensor and went to an old-style distributor (thinking the
> noise was rod noise). When I finally tore everything down and separated
> the engine from the transmission, I found that the factory hadn't gotten
> the flex plate bolts tight. It had come loose and was slotting the holes
> in the flex plate. The mechanical noise was getting picked up by the
> knock sensor and wreaking havoc on driveability, similar to your
> description. It was carbureted but they may be running similar knock
> sensors...
>
> Oh, 1986 305 V8, Rochester 4 BBL, TH700R4, K-5 Blazer (4X4).
>
> Ken in AZ
>
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> Remembering Our Friend Cecil Monson 11-4-2005
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