ok so i posted a thread on this b4 and i didnt really get any help so i took a videos so you guys can see what i am talking about...when i hit the gas the car dies...and i have 2 other cars with no crankshaft sensor giving the exact same problem so it would be the sensor no..? ..but i used an obd2 - obd1 conversion harness and it is still doing the same bull s**t, i also changes the sensor and the f***ing harness and still same s**t...WHAT CAN IT BE...heres the link to the video http://www.youtube.com/watch?v=ANYrHuKM9dc
Civic Dies When I Press The Gas
- Thread starter x_da_don
- Start date
oh and the flashing cel codes that are showing up are the secondary o2 sensor, ckf sensor, map sensor, and iat sensor...thats only because of the other harness....i changed it because i know the ckf sensor wires havent been cut or spliced..im trying to get rid of the ckf problem first....i didnt have the iat or map codes with my other harness and was still having the same problems so i know neither of those are the issue
RonJ
Banned
From what I can tell, this is your fourth thread on basically the same topic. Please don't create multiple threads on the same topic. In addition, you need to provide information about the car, engine, ECU, wire harness, etc., as well as some background on what you have already tried at this point.
By the way, CEL codes for the MAP sensor or CKF sensor can make an engine run like crap.
By the way, CEL codes for the MAP sensor or CKF sensor can make an engine run like crap.
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yea i know...i dont know how to delete my old threads...using a obd2 p75 ecu, i have tried the the ckf bypass trick, i had a b20 in there before but i thouhgt i did something wrong so i took it out and put in a b18 that hasnt been pulled apart or touched still had the same problem...i know its a wiring issue i just cant seem to figure out what it is..and ronj how do i delete my old threads?
RonJ
Banned
No need to delete your previous threads. My point is that you should make new posts related to this same problem within a single thread so that all your information is consolidated in one place. It also helps others to follow along with your progress.yea i know...i dont know how to delete my old threads...using a obd2 p75 ecu, i have tried the the ckf bypass trick, i had a b20 in there before but i thouhgt i did something wrong so i took it out and put in a b18 that hasnt been pulled apart or touched still had the same problem...i know its a wiring issue i just cant seem to figure out what it is..and ronj how do i delete my old threads?
What specific codes are thrown? Have you checked the mechanical timing?
oh ok...will do....but im going to just tell you everything about the car now, and whats being used. I am using a stock civic harness not the ex one, i rewired the iacv, using a obd2 p75 ecu, replaced the ckf sensor, timing is good, compressing is good, ckf bypass trick didnt work(have no clue why and i did it right, i checked is like a million times and im doing it as shown on ff-squads site), i have 2 other cars that dont have the ckf sensor and its the same symptoms as my car.......could it be the evap system because on an si / ex the evap canister has a plug for it where as the non vtec civics dont and thats the harness that im using should i wire it in?
RonJ
Banned
Again, focus on fixing the CKF and MAP sensor codes.
-Measure the resistance of the CKF sensor and check for an open or short in the wires. If none is found, and the sensor is properly pinned to the ECU, then the ECU may be bad.
Describe your MAP sensor set up. Check voltages at the MAP sensor and test for an open or short in the wires.
-Measure the resistance of the CKF sensor and check for an open or short in the wires. If none is found, and the sensor is properly pinned to the ECU, then the ECU may be bad.
Describe your MAP sensor set up. Check voltages at the MAP sensor and test for an open or short in the wires.
i dont have a multi meter and im getting a map code because i switched harness'. but i used and obd1 p75 ecu which shouldnt be looking for a ckf sensor and was still having the same problem..have you see the video? i posted the link at the beginning of the thread.
RonJ
Banned
How can you possibly even consider the idea of fixing a sensor circuit problem without a multimeter? It should be a basic tool in any mechanic's toolbox. Get one and learn how to use it. Enough said.
If you have a CKF sensor code, then I must conclude that your P75 ECU is OBDII (1996-2000 Acura Integra LS/GS) not OBDI (1992-1995 Acura Integra LS/GS).
If you have a CKF sensor code, then I must conclude that your P75 ECU is OBDII (1996-2000 Acura Integra LS/GS) not OBDI (1992-1995 Acura Integra LS/GS).
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ok listen...there are both obd1 and obd2 p75 ecu's..i HAVE both of them, and i also have a conversion harness as i said before...even if i had no mechanic sense anyone can clearly see that the plugs are different....i changed the whole harness because of the fact that i do not have a multi meter...im still getting the same problem which doesnt make sense..im trying to do what i can with what i can can you just help me...my dad let his buddy borrow his months ago who knows where that is and i dont have the money to buy one right now or i would have
RonJ
Banned
What you are missing is that I am trying my best to help you. My low-impedance (10 mega Ohm) digital multimeter, which is needed for car electronics, cost me $15. My model has more bells and whistles than you actually need, so I am confident that you would be able to buy a basic low-impedance digital multimeter for $10 (voltage, resistance, current readings). Do you have a Harbor Freight Tools store in your locale?ok listen...there are both obd1 and obd2 p75 ecu's..i HAVE both of them, and i also have a conversion harness as i said before...even if i had no mechanic sense anyone can clearly see that the plugs are different....i changed the whole harness because of the fact that i do not have a multi meter...im still getting the same problem which doesnt make sense..im trying to do what i can with what i can can you just help me...my dad let his buddy borrow his months ago who knows where that is and i dont have the money to buy one right now or i would have
^^^What other harness are you talking about?i didnt have the iat or map codes with my other harness and was still having the same problems so i know neither of those are the issue
Are you able to install the P75 OBDI ECU and an OBDI conversion harness? If so, how does the engine run and what CEL codes are thrown?
they are both non vtec harness' havent run into a engine wiring harness for an si ...as for the multimeter the one i seen was for like 80 bucks at canadian tire..but i heard of a tools store call princess auto so i will check it out had no clue they were so cheap...do you know how any links on a wiring diragram for the ex wiring harness? the obd1 ecu runs the same as the obd2 ecu,it dies when i hit the gas..they both idle fine its just when i hit the gas it diesit was giving me an cylinder 4 injector code but i fixed that, the problem was with the conversion harness
RonJ
Banned
...as for the multimeter the one i seen was for like 80 bucks at canadian tire..but i heard of a tools store call princess auto so i will check it out had no clue they were so cheap
Take some time to shop around. You can buy a very good multimeter for $10-$15.
they are both non vtec harness' havent run into a engine wiring harness for an si...the obd1 ecu runs the same as the obd2 ecu,it dies when i hit the gas..they both idle fine its just when i hit the gas it dies it was giving me an cylinder 4 injector code but i fixed that, the problem was with the conversion harness
Your information is confusing to follow. Please give clear answers to the questions below.
1) What ECU and engine are the two wire harnesses mentioned above designed for?
2) Which wire harness above do you use for the OBDI versus OBDII ECU?
3) The OBDII ECU currently throws CEL codes for the CKF, MAP, IAT, and secondary O2 sensors, right? Again, what CEL codes are thrown by the OBDI ECU when it is installed?
do you know how any links on a wiring diragram for the ex wiring harness?
For a 96 Civic EX? If so, download the 96-00 Civic service manual at the link in my signature. It has EVERYTHING.
1- i have 2 harness' both for a d16y7 and p2e ecu's
2- i have tried both harness' with both the obd1 and obd2 ecu's
3- it isnt throwing any codes
my cars at my parents i will double check that tomorrow. Should i rev it some and let it run for a while or should i try to drive it to see if any codes will come up?, and thanks for the link
2- i have tried both harness' with both the obd1 and obd2 ecu's
3- it isnt throwing any codes
my cars at my parents i will double check that tomorrow. Should i rev it some and let it run for a while or should i try to drive it to see if any codes will come up?, and thanks for the link
RonJ
Banned
1- i have 2 harness' both for a d16y7 and p2e ecu's
This wire harness and ECU are for a 96-98 Civic DX. Do you have a Civic DX or EX?
2- i have tried both harness' with both the obd1 and obd2 ecu's
To install the OBDI ECU, I presume that you use a conversion harness, right?
3- It isnt throwing any codes. Should i rev it some and let it run for a while or should i try to drive it to see if any codes will come up?
Okay, this is important progress. Install the OBDI ECU and drive the car to see if any CEL codes pop up.
ok i FINALLY got the car running, i know i made this thread a while back but im just getting the car running today, so what i did was take the ewh out and re-wired everything and soldered everything that was sliced before. Told you how i was using an LX harness and not the EX, i wired in what i could to match the EX harness, like the secondary O2 sensor and evap canister shut off. OH another big thing i didnt know about i reset the ecu, just pulling the 7.5 fuse doesnt work....to properly reset my ecu i had to run the car, then pull ther fuse and let it sit for 15 minutes, put it back in start it up for another 15mins and turn back off then right back on....but ronj thanks alot for the help man!