i recently put a 99'B20b in my 90 integra i left it obd0, something is holding it back, when i put it into 1st gear it and i start pushing the gas it takes like a second to respond, and the same when i put it into 2nd gear once its up to 2500rpms it feels fine....

it idles kinda low too, like under 500rpm.

i was thinking of putting my obd2 injectors if possible? just rewire the obd2 plugs on my obd0 harness? will that work?

i cant check my cat without cutting it off cause its welded on.

and if i launch it everything feels fine....

 

How many miles are on the cat? After a while the material inside breaks down and will block the flow of exhaust gasses. What cc injectors are currently in it? What cc are your obd2 injectors? Should idle around 800 to 1000rpm after its warmed up about 1400-1600rpm if its cold. What ecu are you running? What do your spark plugs look like currently? Black, oily, ashy, white, blown appart? Are you running the correct plugs for the b20?

 

I dont know how much miles are on it... the injectors that are currently in it are used ones off a 90'obd0 prelude (b20a) and the obd2 injectors are the ones the 99B20b came with on that giraffe manifold. im running my obd0 pr4 ecu... im running the plugs off my B18a cause they only had 10miles or so on them... they were black when i put them in tho.... i cant check right now cause the motor is hot....

 

So I understand.... when you step on the gas, nothing happens, [there is no response from the engine when throttle is applied] for a sec. or so, but if you "launch", [drop the clutch at 2500 RPM or over] there is no problem.
If so, I would check the TPS.

Or do you mean the response is slow, [RPM climb slowly and there is a lack of power] until you reach 2500 RPM.
If so, there is a long list of things that may be wrong, starting with the ECU/ECM, or the injectors, could be as simple as too much resistance on the injector relays contacts or "cold solder" connections on the circuit board [old PGM-FI Main Relay] until 2500 RPM, [alt. output increases] resulting in low voltage/current at injectors, ECU/ECM and some engine valve/solenoids/sensors, [until/unless RPM is at/over 2500].

First thing I would try is either replace the PGM-FI Main Relay with a new or known working one or "jump" the switches, if for no other reason other then to eliminate it as the problem, easy to do and costs nothing.

The same goes for the cat, with a test pipe you can eliminate it as the problem, in your case I would disconnect at the exhaust manifold/headers jerry rig a pipe and muffler to the manifolds collector, it only has to clear the ground, also easy and cheap to do.

As for installing the the OBD2 injectors, "anything is possible... 94

 

[RPM climb slowly and there is a lack of power] yeah thats more like it.

[old PGM-FI Main Relay] where is that located on a 90 integra?

[alt. output increases] you know what... i noticed earlier that my lights were dim when it was just idling and i pressed the gas and the lights lit up... and theirs a sound the alternator makes that had me thinking too but i didnt pay attention to it till now that you brought it up.

and what if i run just strait headers? will that mess up the valves or anyting?

 

http://www.tegger.com/hondafaq/mainrelay.html

Not sure how the engine would run with just the header, it will definitely be loud and I am pretty sure some back-up pressure is needed for best performance, that's why we add a section of exhaust pipe before a muffler when we bypass a welded exhaust system.

Have a proper load/gravity test done on the charging system, just about any alt./batt. shop will do it for free, it only takes a few min. 94

 

thanks for that link. im headed over to the junkyard in a bit ill try to pick up a main relay.... im gonna try running strait headers just to see if theres any lag, maybe the cat is clogged (hopefully).

the guy on the link didnt say what tools i would need, but im sure its a 10m and a screw driver.

 

Sounds like timing or the tps,

Check timing
Swap tb

If you had a clogged cat you could just pull your o2 sensor real quick and start her up.

Otherwise, FCM got you goin in the right direction as usual


Edit: not sure if its your problem but I never heard of someone using the old prelude b20 injectors, id try using some stock teg injectors, the old injectors may require a resistor and if they do you could **** up your ecu or short some elecrical stuff

 

throttle body?



[/QUOTE]
Edit: not sure if its your problem but I never heard of someone using the old prelude b20 injectors, id try using some stock teg injectors, the old injectors may require a resistor and if they do you could **** up your ecu or short some elecrical stuff[/QUOTE]
what if i use the obd2 injectors (99) it came with? just swap the plugs too.

i have another pr4 ecu i could try using...

 

Otherwise, FCM got you goin in the right direction as usual[/QUOTE]
whats FCM?


[/QUOTE]
Edit: not sure if its your problem but I never heard of someone using the old prelude b20 injectors, id try using some stock teg injectors, the old injectors may require a resistor and if they do you could **** up your ecu or short some elecrical stuff[/QUOTE]
what if i use the obd2 injectors (99) it came with? just swap the plugs too.

i have another pr4 ecu i could try using...[/QUOTE]

Don't think the crv injectors will work they usually don't fit the teg manifold.

 

do i remove the alternator and take it to them or can i take my whole car? is that the test they do at auto zone?


and Ehonda if i take my o2 sensor out that would let me know if my cat was clogged?

 

In the car, it has to be connected to the charging system to test properly. 94

 

ok thanks....

 

got that checked out and it was fine, and i disconnected my cat and it ran the same alil more power tho probably cause it was straight header.

the guy at the shop disconnected the spark plug wire one by one (while it was on). you could hear like a fast slapping sound (a shocking sound) except when he got to the one closest to the distributor that one sounded like a weak slow slapping sound...... he said there was some thing wrong there... he said he could run a diagnostics on it.... but i didnt have any money....

 

Yes, as long as its before the cat, which it should be...

 

I am not sure what could be wrong with a cylinder, [mechanical] that would effect low RPM and not high RPM.

Have you done a compression test yet? 94

 

no. im gonna do it 2mro morning, i talked to my friend that has a smog shop...
i really need to get this fixed...

 

Damn didn't u just order that engine? Itd be hurt if it had bad compression in a cyl

 

Yeah i got it like 2months ago, but i just put it in.....

my girlfriends dad, and uncle are mechanics im just gonna leave it with them for a couple of days....see what they can do with it..

 

thats good, nothing beats experience.

 

As long as their experience isnt just in the diesel truck field. Lol

 

The majority of diesel techs have experience in gasoline engines too. Itd be like putting together a go-kart for a lot of them

 

yeah i hear that.... putting the motor was easy, getting it to run right/ troubleshooting is another... im glad im still with her lol..... hes not gonna charge me for looking at it... i will BarBQ for him or something...

so far my girls dad said that it could be the vacum lines.... and that its running really rich.... it could be my o2 sensor hes still checking it out..

 

it turned out to be a bad Map sensor, changed it and it idles fine now.

 

Yea when it comes to idle, usually jus switch the tb or the iac and idle smooth out