Check engine atts - Honda Prelude Forum

pdipon · 03-05-2009, 09:40 AM

Hey guys i have a fith gen. and my check engine light is on and so is the atts light. i dont know how to get rid of my chenck engine light. it goes away and comes back. i changed my spark plugs and it went away then a little while of driving it came back then i changed my spark plug wires, it went away then it came back. my check engine light reads that the 02 sensors are bad and that my cat is bad but both my 2 sensors and my cat are brand new. it also recently started saying that i have a misfire in all four cylinders with i think is not true. >>>.my other question is ifmy check engine light comes on the atts light comes on with it. i know that. but does that also mean my atts stops working or is it still working when the light is on. thanks guys for all the info. its 99 honda prelude sh with teins HA, a full lip kit and a cat back exhaust and an air intake. with 90k miles. if any one wanna buy let me know.

Kronn 98SH · 03-05-2009, 11:36 AM

Go to AutoWeDontKnow****Zone and have the code(s) pulled. It's free and it'll give you a good idea as to what is wrong.

liquidxnitez · 03-05-2009, 11:43 AM

Instead of blindly changing stuff you probably didn't have to change in the first place, pull the codes, then fix whatever the codes tell you is wrong. Like Kron said, goto Autozone and have them pull the codes. You can also pull the codes by jumping the OBD2 port.

The ATTS is disabled when the light is on.

pdipon · 03-05-2009, 02:50 PM

just went there right now. they said misfire in all 4 cylinders and o2 code bank one censor 2. but before this time i went to autozone i also checked it out before and there was codes for bank one censor 1 and 2. and also catilac deficiency. when when i changed the spark plugs and the spark plug wires all went away. now it all came back

pdipon · 03-05-2009, 07:18 PM

hey any one have any suggestions. please i really need some help

Kronn 98SH · 03-05-2009, 07:57 PM

Quote:

Originally Posted by pdipon

just went there right now. they said misfire in all 4 cylinders and o2 code bank one censor 2. but before this time i went to autozone i also checked it out before and there was codes for bank one censor 1 and 2. and also catilac deficiency. when when i changed the spark plugs and the spark plug wires all went away. now it all came back

That's pretty close to broken English, so I might not fully understand what you mean. It sounds like you're saying you get codes for misfires in all 4 cylinders, plus a code for primary O2 sensor and secondary O2 senson, plus a code for your catalytic converter. If that's the case, you have a lot of codes and possibly a slew of problems.

Now the questions: How long again did you replace the plugs & wires? What plugs & wires did you choose? Did you ever replace cap & rotor? Have any modifications been done to your exhaust? If so, list ALL of them.

pdipon · 03-06-2009, 08:45 AM

ok sorry for the broken english. i have a cat back exhaust, an air intake. during the past year my check engine light CEL would come on and off. and every time i checked it, it was always something diffrent. it ranged from both my O2 censors are bad, and my cat is bad. even though my censors are brand new and my cat was replaced a year ago. now the most recent time i checked my CEL it said that all my clyinders are misfireing and only one of my O2 censors is bad. the one after the cat. Now for what i tried to do to fix the problem. I changed the spark plugs/wires. new O2 censors and still nothing same problem. i also cleaned my iacv with brake parts cleaner and still nothing. i didn't change my cap and rotor. ill check that out today. and i read some where here that i might need to clean my egr valves and ports but i have no clue how to do that. if there is a write up here that would greatly be appreciated. also anyother suggestions would be great. i think this is a common problem in preludes. and many people went as far as changing the whole ignition system and still no luck. please help me out. ill get you all the info you need to try to fix this.

Kronn 98SH · 03-06-2009, 02:27 PM

Quote:

Originally Posted by pdipon

ill get you all the info you need to try to fix this.

Let's start with the questions I already asked.

Quote:

Originally Posted by Kronn 98SH

How long again did you replace the plugs & wires? What plugs & wires did you choose? Did you ever replace cap & rotor? Have any modifications been done to your exhaust? If so, list ALL of them.

Now, I'll get more detailed. Does your car feel like it is misfiring? Does it idle rough of sputter? What O2 sensors did you use? GIVE THE BRAND. What cat did you use? GIVE THE BRAND AND SIZE. What catback did you use? GIVE THE BRAND AND SIZE.

If everything checks out, you might have a bad ECU. Do you have a friend with the same kind of Prelude? You can try swapping ECUs to test this.

pdipon · 03-07-2009, 11:15 PM

ok time for an update. i replaced the cap and rotor and decided to clean my egr valve. so while i was in therei decided to celan my ports as well. well when i was makeing the threads to pull out the ports i snaped the threader in the port so i had to take off the throtle boddie and fuel rail to pull out the messed up port. when i finaly got the ports out and cleaned them with throttle boddie/carb. cleaner, i put everything back together again and now my clynder 1 is not working. there is spark but its missfireing. please guys if you you know what i can do or what i did please let me know
thanks

Kronn 98SH · 03-08-2009, 12:39 AM

Quote:

Originally Posted by pdipon

ok time for an update. i replaced the cap and rotor and decided to clean my egr valve. so while i was in therei decided to celan my ports as well. well when i was makeing the threads to pull out the ports i snaped the threader in the port so i had to take off the throtle boddie and fuel rail to pull out the messed up port. when i finaly got the ports out and cleaned them with throttle boddie/carb. cleaner, i put everything back together again and now my clynder 1 is not working. there is spark but its missfireing. please guys if you you know what i can do or what i did please let me know
thanks

You probably screwed up the injector.

rpwolf · 03-08-2009, 05:02 PM

atts light on when CEL is on, so fix your CEL and that will go away

pdipon · 03-08-2009, 09:39 PM

ok so i spoke with one of my friends and said that i might have a bent pistion rod. is that possible?? i used a lot of carbon cleaner but i thought that that was ok to do. it all wen into the intake manifold. what happens with all that carb cleaner. by the way it had a hard time starting it just kept over turning.

Kronn 98SH · 03-09-2009, 02:17 AM

Quote:

Originally Posted by pdipon

ok so i spoke with one of my friends and said that i might have a bent pistion rod. is that possible?? i used a lot of carbon cleaner but i thought that that was ok to do. it all wen into the intake manifold. what happens with all that carb cleaner. by the way it had a hard time starting it just kept over turning.

It's really not possible to bend a rod by removing and reinstalling your IM. If it wasn't misfiring before, this is probably NOT your problem. However, since you have failed to answer any questions, no further suggestion can be made. So, if you're not going to post some answers, there's really no point in posting at all.