speedo problems

[toyosmoke]

hey, i'm new to this site and could allways use help. i have a 90' 240sx with an sr20det redtop swap. after two years of spending and jumping around shops, i finally have it now i'm having speedo problems and cold start problems. my speed and rpm meters wont work. car is hard to start when cold, allways have to jump. after warming, starts fine. can anyone help?

[Steady_One_S13]

Hey, Welcome to Nico!

First off, the shops here in El Paso don't know anything about the Sr20. I'm guessing the brown plug (located above glove box and ECU) may be wired wrong. Check your start signal / ignition wire (orange). Make sure it's soldered Ka orange to Sr orange. Check Tach signal wiring, Ka yellow/red to Sr yellow/red. I have a 1991 s13. So the wiring should be the same as your 1990.What type of instrument cluster do you have? Digital or analog? Digital ones often go bad, such as mine. The vss can be checked using a FSM.If you need help, do not hesitate to contact me. I live in central, close to Austin High.G/L

Btw, post pics of your ride and introduce yourself to others on this forum.

[angeldunk707]

i had the same problem and the funny thing was my Tach sensor was burnt out in my ECU so if you have any buddies with SR ECUs ...try and borrow theirs and see if it changes anything

[toyosmoke]

i'll try to get pics up a.s.a.p. the wireing looks fine, but i will get it looked at. my cluster is not digital, sometimes mph will shoot on and off whenever it pleases. i was told today that i might need a speed sensor from a 91-94 180sx. does that mean i might also have to get the cluster from 180sx? also heard just need to change speedos from 180sx. thanks for the help

[toyosmoke]

i'll try to get pics up a.s.a.p. the wireing looks fine, but i will get it looked at. my cluster is not digital, sometimes mph will shoot on and off whenever it pleases. i was told today that i might need a speed sensor from a 91-94 180sx. does that mean i might also have to get the cluster from 180sx? also heard just need to change speedos from 180sx. thanks for the help

how do i instant chat with everyone

[Steady_One_S13]

You don't need a speedo from a 180sx. You can use the speedo (same cluster, analog) off an s13 91-94, like I did. It works fine. There is no instant chat or IM, you can just email.Lmk if you need help. Contact me @: [email protected].

[toyosmoke]

if i do that, do i have to change speed sensor?

[Steady_One_S13]

If you're using the S13 cluster, analog or digital, you can use the S13 usdm vss with the Sr20 transmission.

[toyosmoke]

wow, cool man, thanks alot i'll give it a shot and let you know.

[toyosmoke]

by any chance, were you having cold start problems at first when you did your swap?

[Steady_One_S13]

No, not at all. The only problem I had was a faulty Maf. After replacing it, my SRstarted and ran smoothly ever since. Starts up every time.

[toyosmoke]

i finally have money, so let me get this right. i have a u.s. 240sx with jdm sr20det, it has speed sensor so all i have to do is change to 91-94 speed cluster and everything will be ok right? thanks, sorry just nervous.

[Steady_One_S13]

Try to use the old vss that was on the KA. If it doesn't work, get a vss from a 91-94 s13 usdm 240. You can use the vss from the SR, but it'll be in kph. The readings from the speedo will be off by 10 or so mph..

The cluster you have is fine. My 240 is a 91, and I'm using a 90 cluster. I'm also using the same vss from my old KA transmission on the SR.