vartok

i just bought a 93 Civic LX 2 weeks ago. PO said that the person before her had changed the motor, i really didnt put much thought into it.... I have a leaky valve cover gasket, so i checked the engine number to make sure i get the right gasket.... looks like they swapped in a d16z6 motor.... well they also DIDNT swap/chip the ECU and wire up VTEC. so i have a few questions about that....

1. It currently has a p06 ECU and seeing how they didnt wire in vtec, i would say its not chiped... so what wires are what coming off the vtec solenoid?

2. I know the d16 has i higher powerband and redline. if i swap put the p06 with a p28 ECU, will it change the shift points of the tranny to match (its an automatic )

3. as of right now, the car is just a daily driver... so will swaping the ECU for use of vtec effect gas mileage? the last tank i got 29MPG

4. will running the engine off that old p06 harm it in anyway?

virgineg6

do the wires run to the passenger side shock tower? engine harness is original to the engine but they probably stop there, check and findout if they swapped out the dash harness if they did all you will need is the ecu, if not your gonna need to run the wires or get an ex/si dash harness

vartok

no wires at all, nothing plugged into the solenoid, so it looks like they used the stock LX harness. i had already planned on running new wire, just need to know whats what so i can hook them up to the correct pins

vartok

Also, how do you guys feel about buying an ECU from ebay?
http://cgi.ebay.com/ebaymotors/ws/eB...=#ht_500wt_956

94EG8

Shift points for DX and EX automatic transmissions differ as does the gearing. It'll work, but it may shift a little weird. Highway RPM is going to be on the high side with a DX automatic (the EXs had a higher overdrive gear than the DXs due to having a little more power so it drops the cruising RPM down)

vartok

so the LX and DX had the same transmission? because i have an LX

94EG8

Yes. But the EX (only trim level where you could get a Z6 and an automatic) is different. You could add the vtec components to the P06 and chip it with P28 maps, but i'm not sure if that will help at all. I know you can't adjust shift points with crome, maybe with other software.

vartok

yeah, im just going to buy a p28, seems easier.... the person that did the motor sway was the owner before last, so i really dont know what was done... what was the number on the EX tranny? theres a sticker on mine thats says m24a

94EG8

'92 - '94 -> M24A
'95 only -> A24A

What kinda sucks is the EX transmissions have the same number on the sticker, but they are in fact different transmissions. Btw it's been my personal experience that the M24As are tougher than the A24As

vartok

so there is no way to tell if the tanny was swaped too... that kinna sux.... So would you swap out the ecu or just stick with what i have... i really dont want to mess up the gas mileage. thats the reason i bought the car to start with

94EG8

I'd swap the ECU and wire vtec. Don't expect anything crazy for mileage out of an automatic Civic, it'll be decent, but it's not going to be like a 5 speed.

vartok

last tank i got 29MPG (running seafoam in the tank right now) but as long as i stay at 30ish im happy, lots better than the 302 i used to drive... 15MPG on a good day

vartok

that ebay link i posted is the correct ECU right?

virgineg6

37820-p28-a52 is the correct ecu for auto, so yes