97 Blazer check engine light on...

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97 Blazer check engine light on...

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Blazer >> Mechanical & Maintenance >> General Tech Help >> 2nd Gen (1995-2005) Tech >> 97 Blazer check engine light on...

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97 Blazer check engine light on... - 5/1/2005 1:18:18 PM

Jovian2k

Posts: 6
Joined: 2/21/2005
From: Hamden, Ct
Status: offline

I have a 97 Blazer that I did a complete tune up on including cleaning of the throttle body. After the tune up, I started the engine and it was revving at about 1200-1500 rpm even after it had warmed up. The check engine light came on. I disconnected the battery to clear the code and hopefully reset the idling speed, but don't know for sure if this is even possible without a scan tool. I checked for vaccum leaks and didn't find any. I cleaned and swapped out the idle speed motor with a good one and I still have the same problem with high idle and check engine light. Anyone know how I can correct this? thanks

Post #: 1

RE: 97 Blazer check engine light on... - 5/2/2005 9:26:32 AM

LoLoS10Blazer87

Posts: 503
Joined: 3/24/2005
From: Dunn, NC (East Coast representin')
Status: offline

Only thing I can suggest is have AutoZone or someone else check it with an OBDII scan tool and see what comes back.

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RE: 97 Blazer check engine light on... - 5/2/2005 1:16:04 PM

m00nwater

Posts: 3269
Joined: 3/10/2005
From: Redbridge, but I now live in the 'shwa
Status: offline

Ditto...go see a machanic and get him to hook it up to a scanner...I'm not a big fan of the "trial and error" method of fixing problems. I've watched my girlfriedn dump hundreds into her Jeep because she was too stubborn to just go hook it up to the scanner...

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RE: 97 Blazer check engine light on... - 5/11/2005 4:27:47 PM

erl982wd

Posts: 10
Joined: 4/8/2005
Status: offline

Buy an OBDII code scanner. It's cheaper than replacing parts in a guessing game!

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Post #: 4

RE: 97 Blazer check engine light on... - 5/12/2005 2:24:09 AM

timetoblaze

Posts: 586
Joined: 9/9/2004
Status: offline

why buy one when auto zone will scan it for free

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Post #: 5

RE: 97 Blazer check engine light on... - 5/17/2005 3:36:05 PM

thequeen

Posts: 12
Joined: 4/27/2005
Status: offline

I have been having the same problem in my 97 Blazer and after it heats up good and if I come to a complete stop and take off it is shifting hard from 1st to 2nd gear. I am taking it to a transmission shop today after work I will let you know what he says. Or do anybody suggest something different

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Post #: 6

RE: 97 Blazer check engine light on... - 6/15/2005 12:28:18 AM

Jovian2k

Posts: 6
Joined: 2/21/2005
From: Hamden, Ct
Status: offline

Thanks ya I guess the next step is just take it in and get it checked out but time and $ can make that hard to get to lol

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Post #: 7

RE: 97 Blazer check engine light on... - 6/15/2005 3:47:44 PM

Hanr3

Wheels & Tire Moderator
Posts: 3476
Joined: 5/11/2005
Status: offline

Have you driven the truck since the tune up?

Drive it down to autozone and get teh codes pulled, post em up and we'll see what we can on it!!!

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RE: 97 Blazer check engine light on... - 6/15/2005 7:50:49 PM

Jovian2k

Posts: 6
Joined: 2/21/2005
From: Hamden, Ct
Status: offline

Autozone said the codes from the scanner read "high idle speed" lol that is all it read so I dont know what it could be

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Post #: 9

RE: 97 Blazer check engine light on... - 6/15/2005 9:24:24 PM

Hanr3

Wheels & Tire Moderator
Posts: 3476
Joined: 5/11/2005
Status: offline

My Haynes manual for 82-93's lists the following as potential cases of "Excesively High Idle".
1) Sticking throttle linkage.
2) Choke opened excessively at idle.
3) Idle speed incorrectly adjusted.
4) Valve clearances incorrectly adjusted.
5) Vacuum leakes.

It is possible that while cleaning it, you got some gunk stuck someplace it shouldn't be. Have you tried running Sea-Foam through it yet? Read the directions on the bottle. Do the intake cleaning and put a whole botle in your gas tank.

_____________________________

"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan

'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sons DD, engine swap is done.
'00 S10-Blazer 4x4x4 - My

(in reply to Jovian2k)

Post #: 10