wetpinkpants

I have a 2001 Honda Civic LX and I replaced the headgasket ,timing belt and so on. When I got back together it strated and I let run for a about 15 mins and then later I took it for a test drive and when I got back their was smoke from under the hood and the exhaust manifold was cherry red and really hot when I was driving it seem to shift different too. Any idea what I did wrong or what it could be? Thanks

gearbox

iTrader: (95)

thats not normal. usually happens when the cat converter is clogged. im not sure where to start.

wetpinkpants

I have good exhaust coming out ? The check light is on in the car too.

gearbox

iTrader: (95)

see what the code is saying first

wetpinkpants

Ok I found out what code they are the first one is PO335 Crankshaft Position (CKP) Sensor circuit no signal. The car has a new Crankshaft sensor or does that mean something else? The other one is P1298 and I dont know what that means. I dont know if these would make the car run lean ? to make the manifold hot?

gearbox

iTrader: (95)

yup crankshaft position sensor is bad. either a loose connection or a bad sensor. did you get a honda part or generic from the auto store? this sensor is very important in telling the ecu how the crank is turning. you could seriously mess up the motor with a bad sensor.

p1298 is a honda specific code for ELD malfunction. ELD is the electronic load detector. this is a small part in the fuse box that decides when to turn the alternator on and off depending on how much electrical load there is.

wetpinkpants

It was a generic crankshaft is that bad? and how do you fix the other code P1298 ? Do any of these have to do with the exhaust manifold getting hot? Thanks for all your time

gearbox

iTrader: (95)

well aftermarket parts quality isnt always great, hence the reason why it failed so fast or never worked to begin with. for the eld, you need to buy a new one and swap it out. the ckp can affect how the engine runs and if it is on the rich side for a/f mix, you can get extremely hot exhaust which causes all sorts of issues. when you fix the problems, it would be a good idea to replace both oxygen sensors also.

wetpinkpants

I first want to start off and thank you for you time and sorry for all the questions. I thought if the crank shaft sensor didnt work the car wont start? So I should replace the crankshaft sensor with a real Honda part,the ELD and both Oxygen sensors? Thanks

gearbox

iTrader: (95)

yeah start with the crank sensor cause thats the most important. then do the eld and make sure the car runs normally. if it does, do the o2 sensors.

https://www.civicforums.com/forums/2...-detector.html