so i have a 93 civic with a b18b1 and so my check engine light was on so i read the codes and it said it was the thermostat so i changed the thermostat and now when i drive it the car has a rev limit or something and stops at 3000 rpms in all the gears


can you tell me what i did wrong or what i need to fix thanks

 

what was the actual code? there technically isn't a thermostat code.

 

Yeah I've heard of this happening... apparently the computer has spotted condition that puts it into limp mode... it's not your thermostat... you'll need to fix the problem before your computer will come out of limp mode... check your distributor cap and rotor

 

I just had that same issue after I fixedy erratic idle I had a rev limit of 2.5k couldn't go any higher in any gear turns out my throttle sensor was unplugged lol! Check ur electric connections, Check spark plugs, fuel filter and distributor cap, i hope that helps you somehow Brotha good luck

Edit* forgot to mention my engine is a b18a1 but how different could they be.

 

ok well i just noticed this morning that it works fine when cold but after heating up it wont go past i got new spark plugs wires
and the codes i think based of the guy it blinked 6 times then 17 times after
a wire hooked up to the plug that goes to the thermostat was broke so i fixed it now the water in my rasidiator resivior or however u spell it is like steaming now

 

Well, the thermostat is mechanical, so whatever you hooked up won't affect its operation. If it is stuck closed, you can test it... take it out of the engine and hang it from a wire, and submerge it in a pot of water (not touching the edges of the pot). Also submerge a thermometer tip into the water (not touching the edges of the pot). Heat the pot over a burner and wait for the thermostat to open, and note the temperature on the thermometer. Check it against the temperature stamped on the back of the thermostat. If it doesn't open, or if the opening temperature is much different than the stamped temp, replace it.

It could be also that you have the wrong thermostat for your engine vs. the area where you live, so that would be a good time to check that.

I doubt this is the only problem (if it is a problem), though. I have a feeling some kind of sensor is malfunctioning.