Ok the past few days i've been working my *** off to get my friends 88 crx hf hooked up with a 90 crx si motor and tranny.But since i have started there have been nothing but problems.What should have taken a day-1/2 has taken so far 3 days.the axles dont fit the tranny.the tranny is missing a part(not sure what its called) but i know its the part that you hook a cable to it and goes to the back of the speedomoter and tells you how fast you are going.The tps sensor broke while trying to install motor this is partly my fault got a little to rough with it while shaking the **** out of the motor so it would go into place.the negative/ground wire was already corroded and while trying to install it back on the battery today it decieded to go ahead and break on me.ok enough venting.I need to know where i can get the proper axles to fit this swap the car is a 88 crx hf and the motor is out of a 90 crx si.

 

Ok i fixed all those little things yesterday Now the car runs really crappy like its out of time.I cant figure out what it could be for sure it took me awhile playing with the vacum lines to get them straightend out because the hf motor has twice as many vacum lines as the si motor.the idle seems to be fine its right under 1k.The problem is that when you give it gas it's really sluggish/hesitates to rev/go sorta like its outa time or maybe flooding from idial up to around 2500 rpm.from 2500rpm and up it revs fine and runs really strong.Please any suggestions or ideas are greatly appriciated.

 

do you have new plugs, cap and rotor? are your plug wires in the right order?

 

yes i got some new plugs and wires last night and replaced them didnt help any.I also check the cap and rotor they look farely new to me and in good condition.

 

are your plug wires hooked up properly, like maybe you have one of them mixed up?

 

what ecu are you using?

 

Pm6

 

did you re-adjust the TPS?

 

re-adjust? no! i had to put the hf throtle body on there for now until i swap out the tps sensors.could this possibly be the problem?

 

ya.. use the HF TPS sensor on the Si TB, they are the same TPS sensor.

all 88+ civics/tegs use the same TPS.

 

When i get them swapped out and get the si throtle body back on how do i go about re-adjusting the tps sensor?

 

you will have to "tap" into the wire that come from it and check the voltages.

http://www.crxpower.net/~silve...l.pdf

^ right-click save as. it's a shop manual for the CRX.

 

Any other suggestions???

 

I'm thinking that possibly the cam is out of time a toothe or 2 and maybe the dizzy is going bad would that cause the sluggish throtle response?

 

its definately the tps. i did the same thing with my car. forgot to plug it in when i took it out to mess with some vacuum lines. anyway, use the hf tps on the si TB and make sure its plugged in. also dont forget to reset that ECU! good luck

 

Ok i swap the tps sensor from my hf throtle body 2 my si and readjusted them like the previous suggestions.But the motor still runs really bad it's still really sluggishin the low rpm range and seems to straighten out around 3k plus its back firing some .I cant think of what the issue maybe.I'm thinking that i need to possibly get a si wiring harness because i just used the hf since i was told it was all plug and play no need to moddify it.It still doesnt make sense though because there is a sensor on the si intake manifold that has no where to plug up to on the hf wiring harness.Plus i've been trying to figure out these vacume lines i figured out where some of them go but the si manifold only has like 2 places to plug vacume lines up as to the hf had 4.Please some one help me.Because i'm confused!!

 

Ok, before you make reference to anything, look at the part in a manual or something. I'm guessing your plug on the back of the SI that doesn't have a wire to it is the FICV(S). If you don't have really cold weather then don't worry about it. Look at the manual for a vacume diagram. Do you have all the correct smog equipment for the SI? Is idle adjusted? What you are describing is "bog." This usually refers to to much fuel which causes the engine to slow down until it is all burnt up. Are you sure your not boging the engine with too much throttle and not enough clutch? Double check all grounds, wires, sensors, adjustments, lines, and connections. You should be set then.

 

by bog i mean from idial to about 3k-rpms it hesitates to rev up. then from3k-rpms up there it seems fine.Plus at idial it doesnt run smoothe at all

 

Anyone else have some ideas?

 

are you sure that the woodruff key was pointing at the arrow on the block when you set the timing?

 

100% sure the firing order is correct? for some odd reason I don't think I have ever got mine right the first time.. I always try to go from memory my memory sucks. double check it. sound to me like timing issue or firing order issue.

 

I had the same problem when I swap another si motor into a 89 crx. My problem was a loose ground on the thermostat housing. The ground wire is on the wiring harness. Good luck.

 

I remember turning the crank to tdc and then doing the same on the head. So the vavles wouldnt be open on cyclinder 1and4 and also so the vavles wouldnt get bent when i set the head on and torqued the bolts to specs.I know the firing order is right i checked it 10 times while looking it up in my haynes manual it said the order is 1,3,4,2 going clock wise.

looking at it like this as if you were looking at the dizzy.
3,4
1,2

I hate having to set the time since the little white mark on the crank pulley is hard to see (with the pulley being so old)

 

how did you determine tdc at the crank?

 

I turned the crank until the slot for the woodruf key was straight up also bring #1,4 cylinders to to tdc. I'm pretty sure i did it right because it runs just not like its supposed to.I know that if it was to much off it wont run at all.