I know this topic has been discussed previously, but am wondering if GM has upgraded the knock sensor?

I have an 85 trans am, 305 tpi. Just dropped in a 350 tpi. Did some research, the advice is to replace the knock sensor with one for a 350. I went to the local GM dealer, the parts guy looked it up on the computer, compared the part numbers. He showed me the results. It is the same part number for both engines. I also checked another supplier, same story, same part number.

What gives? I simply cannot locate a different knock sensor for the 350. Am I missing something?

 

As far as I know there was no 5.7L TPI engine in 1985. Maybe this confused the parts guy you talked with.

I just checked 1992 Camaro Z28 with both 5.0L and 5.7L engines on rockauto and there are different ACDelco part numbers for knock sensors there.

 

they are defiantly different, if you run a 305 sensor in a 350 it will constantly be pulling timing out.

 

Model Year ENGINE OEM Number Purchase
Beretta 1995-1994 2.2L (4) 133 10456001 29031
Beretta 1996-1996 2.2L (4) 133 10456209 29027
Beretta 1993 2.3L (A) 140 1997562, 10456017, 10456287 29014
Beretta w/MT 1994 2.3L (A) 140 1997562, 10456017, 10456287 29014
Beretta 1992-1990 2.3L (A) 140 10456019 29015
Beretta 1989-1987 2.8L (W) 173 10456208, 10497163 29015
Beretta w/AT 1996 3.1L (M) 191 10456238
Beretta w/AT 1995-1994 3.1L (M) 191 10456208, 10497163 29015
Beretta 1992-1990 3.1L (T) 189 10456019, 10456208, 10497163 29015
Beretta 1993 3.1L (T) 189 10456208, 10497163 29015
Camaro 1992-1990 3.1L (T) 189 10456019, 10456208, 10497163 29015
Camaro 1999-1996 3.8L (K) 231 10456215 29026
Camaro 1980 4.9L (T) 301 1997463 29017
Camaro 1982 5.0L (7) 305 1997463 29017
Camaro 1992-1990 5.0L (E) 305 1997562, 10456017, 10456287 29014
Camaro 1989-1988 5.0L (E,F) 305 1997562, 10456017, 10456287 29014
Camaro 1992-1991 5.0L (F) 305 10456126 29020
Camaro 1990 5.0L (F) 305 10456019 29015
Camaro 1986-1983 5.0L (F) 305 1997562, 10456017, 10456287 29014
Camaro 1987 5.0L (F,H) 305 1997562, 10456017, 10456287 29014
Camaro 1992-1990 5.7L (8) 350 10456031, 10456549 29019
Camaro 1989-1987 5.7L (8) 350 1997699, 10456018, 10456288 29016
Camaro w/Locating Tab, 1st Design 1998-1998 5.7L (G) 350 10456222 29029
Camaro 1995-1993 5.7L (P) 350 10456126 29020
Camaro 1997-1996 5.7L (P) 350 1997562, 10456017, 10456287 29014
Caprice 1993-1992 4.3L (2) 262 1997699, 10456018, 10456288 29016
Caprice 1995-1994 4.3L (W) 265 10456126 29020
Caprice 1996-1986 4.3L (W) 265 1997562, 10456017, 10456287 29014
Caprice 1990-1985 4.3L (Z) 262 1997699, 10456018, 10456288 29016
Caprice 1993-1991 5.0L (E) 305 1997562, 10456017, 10456287 29014
Caprice 1990-1989 5.0L (E) 305 1997562, 10456017, 10456287 29014
Caprice 1990-1988 5.0L (Y) 307 10456019 29015
Caprice 1993-1991 5.7L (7) 350 1997699, 10456018, 10456288 29016
Caprice 1996 5.7L (J,P) 350 1997562, 10456017, 10456287 29014
Caprice 1995-1994 5.7L (P) 350 10456126 29020
Cavalier 1995-1994 2.2L (4) 133 10456001 29031
Cavalier 1999-1996 2.2L (4) 133 10456209 29027
Cavalier 1995 2.3L (D) 138 1997562, 10456017, 10456287 29014
Cavalier 1998-1996 2.4L (T) 146 10456209 29027
Cavalier 1989-1987 2.8L (W) 173 10456208, 10497163 29015
Cavalier 1994-1990 3.1L (T) 189 10456208, 10497163 29015
Celebrity 1989-1987 2.8L (W) 173 10456208, 10497163 29015
Celebrity 1990 3.1L (T) 189 10456208, 10497163 29015
Corsica 1995-1994 2.2L (4) 133 10456001 29031
Corsica 1996 2.2L (4) 133 10456209 29027
Corsica 1992-1990 2.3L (A) 140 10456019 29015
Corsica 1989-1987 2.8L (W) 173 10456208, 10497163 29015
Corsica w/AT 1996 3.1L (M) 191 10456238 29028
Corsica w/AT 1995-1994 3.1L (M) 191 10456208, 10497163 29015
Corsica 1992-1990 3.1L (T) 189 10456019, 10456208, 10497163 29015
Corsica 1993 3.1L (T) 189 10456208, 10497163 29015
Corvette 1989-1987 5.7L (8) 350 1997699, 10456018, 10456288 29016
Corvette 1991-1990 5.7L (8) 350 10456031, 10456549 29019
Corvette 1982 5.7L (8) 350 1997463 29017
Corvette 1986-1984 5.7L (8) 350 1997562, 10456017, 10456287 29014
Corvette w/Locating Tab, 1st Design 1998 5.7L (G) 350 10456222 29029
Corvette Button Types, 1/4"18 Thread 1990 5.7L (J) 350 10456075 29036
Corvette 1996-1993 5.7L (J,P) 350 1997562, 10456017, 10456287 29014
Corvette 1995-1992 5.7L (P) 350 10456126 29020
El Camino 1988-1985 5.0L (G,H) 305 1997562, 10456017, 10456287 29014
El Camino 1983 5.0L (H,S) 305 1997562, 10456017, 10456287 29014
Impala 1990-1985 4.3L (Z) 262 1997699, 10456018, 10456288 29016
Impala SS 1996 5.7L (J,P) 350 1997562, 10456017, 10456287 29014
Impala SS 1995 5.7L (P) 350 10456126 29020
Lumina 1999-1996 3.1L (M) 191 10456238 29028
Lumina 1995 3.1L (M) 191 10456208, 10497163 29015
Lumina 1992-1990 3.1L (T) 189 10456019, 10456208, 10497163 29015
Lumina 1994-1990 3.1L (T) 189 10456208, 10497163 29015
Lumina 1993-1993 3.1L (W) 189 10456208, 10497163 29015
Lumina 1997-1996 3.4L (X) 207 10456238 29028
Lumina 1999-1998 3.8L (K) 231 10456215 29026
Malibu 1998-1997 2.4L (T) 146 10456209 29027
Malibu 1999-1997 3.1L (M) 191 10456238 29028
Monte Carlo 1999-1996 3.1L (M) 191 10456238 29028
Monte Carlo 1995 3.1L (M) 191 10456208, 10497163 29015
Monte Carlo 1997-1996 3.4L (X) 207 10456238 29028
Monte Carlo Turbo 1981-1980 3.8L (3) 231 1997463 29017
Monte Carlo 1999-1998 3.8L (K) 231 10456215 29026
Monte Carlo 1990-1985 4.3L (Z) 262 1997699, 10456018, 10456288 29016
Monte Carlo 1988-1985 5.0L (G,H) 305 1997562, 10456017, 10456287 29014
Monte Carlo 1983 5.0L (H,S) 305 1997562, 10456017, 10456287 29014

 

1985 Corvette had a 350 TPI motor.

http://shop.advanceautoparts.com/web...SAMS_545477178___

Interestingly enough, advance auto and rock auto both show the same sensor being used in 1985 for the 350 and the 305, but different sensors being used in other years. Might have something to do with the 1985 ECM having a separate computer/module for the MAF.

 

We were talking about a 85 Trans Am, or not?

 

http://www.automotiveforums.com/t571..._code_43_.html

Found this thread about an 85 305/350 swap as it pertains to knock sensors. There might be an ESC module issue as well.

 

Yep, that's what I did essentially--dropped in a Corvette motor for that year. Corvette was the only car with a 350 TPI in 85. Reading the posts here, it looks like later on, GM went to a different KS. The ESC module is the same part number also.

 

yes, 85 Trans Am. 350 is a great swap, everything hooks up. The 305 in mine was a Chevy motor, not a Pontiac, and that may have made the swap easier. Although I also added a CAI to increase air flow.

 

Thanks! Looks like the numbers match up for an 85 'Vette and the '85 Camaro.

 

Okay, but where do I find the right KS then? Every supplier I checked has the same part number for both.

 

Thanks! That's a very helpful discussion. I havent run into an ECM problem so far, everything else seems to match up. Good thread to bookmark.