We are gonna put a h22 in my friends Accord but I have no Idea what OBD it is. It will probably be a 99 usdm h22a4 or a JDM H22.

 

<U>O</U>n <U>B</U>oard <U>D</U>iagnostics. Stick with OBD I if you can. If you do go OBD II, get a wiring harness adapter from KTeller8.


[Modified by Stew Pidasso, 5:56 PM 12/30/2002]

 

Quoted from the web...
OBD I
ON BOARD DIAGNOSTICS (OBD)
WHAT IS IT AND WHAT DOES IT MEAN TO YOU?

by Fred Bordoff

OBD, or on board diagnostics, was first introduced by General Motors in 1981. The purpose of ‘OBD’ was to monitor the emission control system in the car. When the computer system of the car sees a fault in the emission control system, three things are supposed to happen. First, it would set a warning light on the dashboard, to inform the driver that a problem existed. Second, to set a code in the computer. Third to record that code in the computer’s memory, that can be later retrieved by a technician for diagnosis and repair.

This system worked so well, in 1986 California mandated that all cars sold in the state be equipped with ‘OBD’. This then became an industry standard throughout the nation, and all cars sold in the nation had some form of ‘OBD’

This first version of ‘OBD’ had a lot of shortcomings. First, it only covered the engine emission system. The fuel tank vapors were not monitored. The exhaust emissions were not measured. And only devices specifically installed for emission control were monitored. Second, there was no standardization throughout the industry. Each manufacturer had a different term for the warning light that was illuminated when a fault was determined. GM called it a ‘check engine’ or ‘service engine’ light. Chrysler called it a ‘power loss’ light. Ford called it an ‘engine’ light. Most foreign cars called it a ‘check engine’ light. This was not only confusing to the technician, but also to the motorist. Many motorists upon seeing the ‘service engine’ light illuminated, brought their car to a repair facility and either asked for an oil change or tune-up, expecting the light to go out. Needless to say, this did not happen, and after spending unnecessary money on service work, the system then had to be diagnosed and repaired. The coding system for each manufacturer was also different making diagnosis much tougher.

The clean air act of 1990 mandated that beginning with the 1996 model year, all cars sold in the U.S. be equipped with a new version of on board diagnostics This system became known as OBD II. The manufacturers beat the deadline and almost all cars were equipped with OBD II in the 1995 model year. If your car is a 1995 model or newer, chances are it is equipped with OBD II.

Among the many differences between OBD and OBD II, was the standardization of the system. All dashboard warning lights now say ‘check engine’, usually with a picture of an engine with the word ‘check’ across it. The coding system is now standard. There are now over 400 possible trouble codes that can be stored in the system. All causes of excessive are now monitored. If the gas cap is left loose and vapors are escaping from the gas tank, the ‘check engine’ light will be illuminated and a code will be set. It is extremely important now that the engine be shut off when refueling the vehicle. Another big difference between the systems is that with OBD when a fault is seen the warning light is illuminated and a code set. The warning light will then go out when the fault is no longer seen, but the code will be set and retained in the computer’s memory. In OBD II systems the light does not go out until the fault is repaired and reset by the technician. This can create two problems for the motorist, first, if the warning light is set because of a loose gas cap, it will not go out when the cap is tightened. The car will have to be brought to a service facility to reset the light, at a cost to the motorist. Second the danger exists that when the car is brought into a repair facility, the technician might reset the light without actually repairing the fault. In this case the light will come back on again.

It is important that the motorist be aware of the ‘check engine’ light, as well as all other dashboard warning lights and what they mean. This knowledge will help eliminate unnecessary costs due to unnecessary repairs. When any dashboard warning light comes on, check the owners manual before bringing the car to a repair facility.

OBD II

On-Board Diagnostic (OBD) systems are self-diagnostic systems incorporated into the computers of new vehicles. All 1996 and newer vehicles less than 14,000 lbs. (e.g., passenger cars, pickup trucks, sport utility vehicles) are equipped with OBD II systems, which are California's second generation of OBD requirements. The OBD II system monitors virtually every component that can affect the emission performance of the vehicle to ensure that the vehicle remains as clean as possible over its entire life, and assists repair technicians in diagnosing and fixing problems with the computerized engine controls. If a problem is detected, the OBD II system illuminates a warning lamp on the vehicle instrument panel to alert the driver. This warning lamp typically contains the phrase Check Engine or Service Engine Soon (see below). The system will also store important information about the detected malfunction so that a repair technician can accurately find and fix the problem.

 

it is obd1, and the lude motor is obd2.

like they said and describe, obd1 is better for now.

 

Damn Stew nice article good find...

 

Yeah, good job, Stew
Accords are OBD1 all the way to 95.

 

The 95 Accord V6 was OBD2. Everthing 96 and up is.

 

Damn, I wish I would have bookmarked them. There were 2 sites I got them from.

 

What they said.

But if you're going to put an H22a4 in a OBD-I chassis, you have to modify a few things. FIRST, you need to switch distributors from the OBD-II to an OBD-I dist. You'll be able to set your timing with the OBD-I dist.

Secondly, you need to switch out the fuel injectors for H22a1, peak-n-hold injectors. You can wire them straight up with your resistor pack. H22a4 injectors are saturated, which won't work with the OBD-I P13 ECU.

Use your stock F22 wiring harness. And you'll need to add the basic 3 VTEC related wires.

 

all us model cars 96+ are obd2 now there are even two obd2 versions i know like in some cars they changed a bit and its like obd2-2 if its like 98+ or 99 in some cars..

 

You have an OBD1 car Get an OBD1 JDM Prelude motor.

 

Can you point me to some information on this OBD2-2?

 

or a usdm OBDI H22A1, h22a4 is cast open deck

 

yeah i ll find it , thats why , when you see companies who create the obd conversion harness's they have Version A and Version B