k i have done everything. full tune up(fuel filter/air filter/spark plugs/wires/cap/rotor), new O2 sensor, new caty, new timing belt/water pump/head gasket/arp headstuds(solved heating prob. resurfaced head), fairly new b16 injectors.

now the problem is this. we tested it with a tail pipe test. at idle it was okay and rpms dont jump around at idle..idle is smooth(HC level of 68) and then he ran it at 2500rpms and it was okay {at like 120 hc level}(from 1500-4000rpms it cant hold a steady rpm without dropping and raising) so then he let the rpms back to idle and then suddenly the HC levels went to 800, they are supposed to be under 100 at idle. now im guessin whatever is causing the car not to hold a consitent speed is casuing the smog issue. Question is have any of you ran into this problem..when i drive under 4k it has a little jerk cuz it cant hold a steady spead. what can cause this problem?


Modified by purestreetracer at 8:00 PM 5/7/2008

 

Fuel Filter/pump may be causing the jerking..

If you get that rectified and still can't pass try some stuff called "Guaranteed To Pass" you can buy it at autozone/checker, any parts store really, should do the trick.

 

i stated already that i changed the fuel filter. emm i dont think its the pump cuz its running rich not lean. so im wondering if its the three things i mentioned..waiting on someone who has ran into this problem before..my car is 100 percent stock. i tried that autozone stuff..lol and it didnt work

 

test your map sensor.Or check your cold start valve,that can start surging on your car.Or pm "THESMOGMAN"

 

but can it cause the car to run rich? its running high HC levels out the tail pipe..so whatever is causing the inconsistent speads is related to the high HC leves? and the cold start valve surges your rpms at idle..my idle is fine.


Modified by purestreetracer at 8:01 PM 5/7/2008

 

i changed my ingnitor and coil. they were used but in good condition. still has the hesitation at steady speeds.

 

TPS?

 

mmm maybe..but no CEL. whats the voltage supposed to be at on the TPS. so when i install the new one its at the right setting. cuz you can adjust the TPS right?

 

About .5 to 4.7 Volts. Maybe you have a vacuum leak causing the unsteady revs.

 

ya im starting to think that and i think i might know where it is..cuz i broke a check valve and had to replace it under the IM. it goes to a box that bolted to the back of the block..i might have torn that hose before when i was tryin to replace the check valve. thats the only thing i can think of right now..there are like 4 other people with this prob on honda tech.