intermittant high idel

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intermittant high idel

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Blazer Forum >> Mechanical & Maintenance >> Engine & Transmission >> intermittant high idel

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intermittant high idel - 9/22/2008 4:08:22 PM

gscrippler

Posts: 74
Joined: 4/26/2008
Status: offline

95 Blazer 4.3L Have a high idel when Veh. is cold. Replaced TPS, IAC,& Coolant Temp Sensor also checked for Vacuum leekes, Still continues. Have recently replaced Spider injector and replaced all vacuum lines. Any suggestions? Thanks

Post #: 1

RE: intermittant high idel - 9/22/2008 5:17:19 PM

swartlkk

Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: online

Have you checked the EGR valve?

Another way to rule out vacuum leaks is to block off all vacuum ports on the intake. If the high idle continues, then the vacuum driven accessories are not at fault.

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to gscrippler)

Post #: 2

RE: intermittant high idel - 9/24/2008 2:00:43 PM

gscrippler

Posts: 74
Joined: 4/26/2008
Status: offline

ok i''ll look into that, To your knowledge is there any other sensor that might effect the idel?

(in reply to swartlkk)

Post #: 3

RE: intermittant high idel - 9/24/2008 7:28:32 PM

swartlkk

Posts: 14472
Joined: 5/1/2005
From: Waterloo, NY
Status: online

Nothing besides parts you have already thrown on.

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to gscrippler)

Post #: 4

RE: intermittant high idel - 10/5/2008 3:57:57 PM

gscrippler

Posts: 74
Joined: 4/26/2008
Status: offline

Ok, Hooked up to TECH 2, Air intake temp sensor was reading -40F checked voltage and found that 1 of the wires was broken inside the insulation so replaced the plug (connector) next morning it high idel again while high ideling hooked up to TECH 2. TPS was reading 6% open and the voltage was off.63 i think, I had recently replaced the TPS while trouble shooting another problem. Anyway put the old one back on and the voltage seemed a little better .55 so I will try this out and see if it cures it. Will probably try a new another New TPS I notice the shifting from 1st to 2nd is a little rough it was much smoother with the other TPS.

(in reply to swartlkk)

Post #: 5