Need help with code 25 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dadsbrew · 02-19-2008, 12:47 AM

hope some of you can help me out. I have a 88 s10 with 4 cyl. starts fine and runs good cold but when it warms up it starts stumbling and cutting out, its hard to keep it running. I changed spark plugs, cap, rotor, plug wires. It still throws code 25. Any Ideas ?

89 crew · 02-19-2008, 03:39 AM

I did a bit of searching and I found a code 25 is a Intake air temp sensor error. Is that what you have a code 25 as?

C.W · 02-19-2008, 04:10 AM

Check for a broken or dis connected wire. I believe on those its in the air cleaner housing. If that all looks good replace it and clear the codes. It should be fine after that. I had the same problem with my astro van when i put the small block in.

68C15 · 02-19-2008, 06:54 PM

we are talking a 2.5 right? the IAT is in the intake manifold.

dadsbrew · 02-20-2008, 07:26 AM

Thanks guys, yes it is a 2.5 and my plan is to replace the intake manifold air temp sensor and go from there.

02-19-2008, 12:47 AM	#1
dadsbrew Registered User Join Date: Jan 2008 Location: Federal Way, WA Posts: 53	Need help with code 25 hope some of you can help me out. I have a 88 s10 with 4 cyl. starts fine and runs good cold but when it warms up it starts stumbling and cutting out, its hard to keep it running. I changed spark plugs, cap, rotor, plug wires. It still throws code 25. Any Ideas ? __________________ 1970 K-10 400CID, to much cam--not enough compression Stan's Headers and a 4" lift / 1990 R1500 Suburban 4X4, 350CID with vortec heads, edlebrock intake, TBI, 10:1 compression and Stan's Headers "The probability of someone watching you is directly proportional to the stupidity of your actions"

02-19-2008, 03:39 AM	#2
89 crew Registered User Join Date: Mar 2006 Location: Kansas Posts: 865	Re: Need help with code 25 I did a bit of searching and I found a code 25 is a Intake air temp sensor error. Is that what you have a code 25 as?

02-19-2008, 04:10 AM	#3
C.W Registered User Join Date: Jun 2007 Location: Penticton BC Canada Posts: 84	Re: Need help with code 25 Check for a broken or dis connected wire. I believe on those its in the air cleaner housing. If that all looks good replace it and clear the codes. It should be fine after that. I had the same problem with my astro van when i put the small block in. __________________ 86 Burb, 5/7 drop, 18" rims, big stereo, work in progress, as well as daily driver. 86 Short box just starting the build. 86 GMC 1500 2wd, ugly blue farm looking truck with a mild 454... More to come! 98 Cheyenne Ext cab short box 2wd. Driver and maybe future project.

02-19-2008, 06:54 PM	#4
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: Need help with code 25 we are talking a 2.5 right? the IAT is in the intake manifold.

02-20-2008, 07:26 AM	#5
dadsbrew Registered User Join Date: Jan 2008 Location: Federal Way, WA Posts: 53	Re: Need help with code 25 Thanks guys, yes it is a 2.5 and my plan is to replace the intake manifold air temp sensor and go from there. __________________ 1970 K-10 400CID, to much cam--not enough compression Stan's Headers and a 4" lift / 1990 R1500 Suburban 4X4, 350CID with vortec heads, edlebrock intake, TBI, 10:1 compression and Stan's Headers "The probability of someone watching you is directly proportional to the stupidity of your actions"

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