93 MX-3 V6 hesitation issue(edited 7/15/12)

[cWs306]

I just went through this entire issue, to much throttle and the car bogs out n hops around, ease the throttle n u can get it to a high rpm. check your o2 sensors, if you dunno what wires what. buy new ones, o2 sensors are the brain of the motor from 0-4000rpms. if they dont work right, your motor wont run right. and also before you buy stuff, take off the rubber piece of the intake and stretch twist n see if u can see any cracks. and also test your ignition coil in your distributor, take ur multi meter and stick both pins on the outer prongs of the 3 prong plug, leave the middle on alone. you should read 11.5 to 18ohms. anything different its pooched. good luck!


Edit, i just looked at ur o2 sensor wires. is that a little chunk of bare wire hanging out by the plug? if so, theres your issue i bet.

Wait nvm, that looks like a ground wire off of crank angle sensor. wtf!

[mikeinaus]

well the 2 black are your heater wires. out of the other 2 1 is ground and 1 is signal. 50/50 shot of getting it right...

forgot to mention the black wires dont matter which one they are connected too. its just the signal/ground you need to worrk about.

[kyser182]

Hopefully I get some time soon to check the wires. The o2 sensor in the front is new denso

Need to jack her up onto my ramps to check the other sensor

Thanks for giving me a starting point.

[cWs306]

you can see if from the top of the engine, on the drive side at the back corner of the intake. get a flash light. i can reach mine with a wrench, tough to get off but doable.

[kyser182]

Oh i see it down there.. haha. thats going to be fun. I have ramps.. I just cant drive up them, car is to small/low

So i rewired my front O2 sensor tonight. was definitly not wired right. Will have to check how it does tomarrow after work.
Im unsure of plug on rear O2 sensor if it is there or not. when i find out, hopefully tomarrow i will purchase that one on payday.
going to buy a TPS from one of our members on payday too.
*cross fingers* that this helps!

anything else i should be looking at testing/replacing due to this hesitation?
has new plugs/wires/rotor/cap a few months back. i pay pull cap off and see how it looks inside tho

[cWs306]

did you test your coil? and for the ramps, get some chunks of 2x6 and make the ramp part longer. do it in grass so they stay in place. and to find the plug, reach for the o2 sensor and slide ur finger up the wire until you get to the plug.

[Ryan]

a vacuum issue is more likely to cause this issue than O2's, especially if you're not getting O2 codes.

[kyser182]

I do get a check engine light. Have since I bought the car. I've just not had the codes pulled since I got it. The auto tech said it was o2 sensor. But said he wasn't able to tell me exactly what code pulled.
note. I do not take my car their anymore.

[SuperK]

I don't mean to sound rude or disrespectful, but I'm not feeling well so it's prolly going to come out that way

You have a check engine light on. Your car is trying to tell you what's wrong. Listen to your car, then listen to the forums. Please make sure your next post is with the CEL codes.

[mikeinaus]

all you need is a paper clip to pull codes. search the forum and youll find out its really easy to get them...

i dont know why one has never been made, but would it be possible for someone to make a sticky on pulling codes, complete with a list of what the codes are? ive used this thread for years http://forums.beyond.ca/showthread/t-47452.html for what the codes are. it seems alot of people have been asking how to check them lately, or had the thought you needed a scan tool. perhaps one of the members with better grammar/sentence structure then myself?

[kyser182]

...

[kyser182]

1long 7 short, 2 long 9 short, 4 long 6 short
17 LHO2S inversion error
29 EGR vent solenoid
46 VRIS #2 solenoid

Im not at home. But I will be in a few hours. Posting from phone
Am I right with those?

[SuperK]

LHO2S inversion error
VRIS #2 solenoid
EGR vent solenoid

[kyser182]

So is that the front or rear o2 sensor? Doesn't exactly say lol
I am so sorry to you all that it took so long to get these codes to you. Work and life is busy stuff.
Does VRIS stand for something?
Searching autozone I don't see a vent solenoid. Only a vacuum solenoid. Im sorry im such a noob here

[mitmaks]

Where is plug for the rear o2 sensor. I see it goes upwards and I definitely can't reach it from the bottom. I hope I don't have to pull engine on this car just to change out O2 sensor.