i have a 1990 si with a dohc zc , changed the dis. cap and rotor with new spark plugs. but everytime i start it in the cold its fine but when i try to start up when its warmed up it has trouble or doesnt even start at all. and i been getting the code 4 and i think its 17 my speed sensor , not sure though . could it be my dist that needs to be replaced or my alternator? cause both are getting kind of old. and when driving i won't be able to pass 3k ... thanks

 

up

 

Yeah that 17 is vehicle speed sensor and the code 4 is crank position sensor

 

Does your spedometer work? If your car is in limp mode, its probably code 4 thats doing it. (Correct me if i'm wrong) I think the crank position sensor is inside the dizzy.

 

FAQ: Engine codes:
https://honda-tech.com/zerothread?id=1171263

FAQ: Engine Code Troubleshot:
https://honda-tech.com/zerothread?id=468260

now, i did not post htese to be an *** like most people. these are so you can refrencem y information.

under.... MPFI for code four:
http://www.we-todd-did-racing....3D%3D
http://www.we-todd-did-racing....3D%3D

follow the first link... read ont he left... follow the second link. this will tell you how to test your distributor for a faulty crank angle sensor.

(code 4 is crank angle). you will need a multimeter to do these test.

I hope this helps you out! and check out the faq on future post for the check engines. so people have a better idea what is wrong.(first link i gave you, bookmark it, comes in handy : P)

 

thanks very useful

 

how did it go? get it to start?

 

fix the crank sensor issue and check the main relay.
main relays have a problem with cold solder joints and sometimes wont start when its hot outside