Fuelly Forums

Fuelly Forums (https://www.fuelly.com/forums/)
-   General Fuel Topics (https://www.fuelly.com/forums/f8/)
-   -   88 CRX HF, bad fuel mileage (https://www.fuelly.com/forums/f8/88-crx-hf-bad-fuel-mileage-4927.html)

88HF 06-16-2007 05:10 PM

new info!
 
4 Attachment(s)
I swapped the fuel injectors from the 90 HF to the 88 HF. Turns out the 88 had different injectors with rubber tips while the 90 appeared to have ceramic tips. Also the 88 was missing the center ceramic spacer on the fuel rail. I can tell a huge difference in the injectors. I think I need to bump (advance) the timing a little cause the idle is ****ty. I'm also gonna run fuel injector cleaner next tank, but on the run around town today (20 miles) my fuel gauge didn't even go down noticeably at all. Which is a difference to before.https://www.gassavers.org/attachment....1&d=1182042561
injectors from 1990 CRX HF probably with 312K miles.

https://www.gassavers.org/attachment....1&d=1182042561
suspect replacement injectors found in 1988 CRX HF with very low miles.

SVOboy 06-16-2007 05:12 PM

:thumbup: Hope that was the problem.

88HF 06-16-2007 05:17 PM

yeah the replacement gaskets were shorter also, I remember him saying that they had sent him the "wrong injectors" the first time. who knows maybe the first ones were wrong too. He also said it was easy to change them, at least he was right about that.

SVOboy 06-16-2007 05:18 PM

Are you using the 90 at all?

88HF 06-16-2007 05:33 PM

I tell my family "I bought it for parts" cause they always talk like my cars are ****. Really the injectors are the first thing I've taken from the car. I do plan on swapping the engine so I won't buy new injectors. I don't have it insured but it does drive (needs a battery). I drove it around the block once after I used a bottle of block and head gasket repair cause it has a blown, maybe warped head. It sounded better than the 88 when I cranked it up though. Adding insurance on it right now would just be too much. I want to sell my truck, but my parents/boss/g/f all want me to keep it. I know the a/c in the 90 CRX works awesome cause it was blowing cold right after I started it up, my 88 never blew that cold before it went out.

Anyway, its my parts/project car. I'll take parts off that I plan on replacing when I do the engine swap, but I really want to keep it running just incase. My g/f drives my vehicles too so if the 88 or my truck die, it'd be nice to get the red car running.

SVOboy 06-16-2007 05:37 PM

Ah, I see. What use does the truck have for you?

88HF 06-16-2007 05:39 PM

my g/f drives it, and I used it to move from Baton Rouge. Its my "reliable" backup transportation.

88HF 06-16-2007 05:40 PM

1

88HF 07-08-2007 05:20 PM

Today I found out that only the 88 crx hf uses 180cc/min injectors and 89-91 crx hf uses 235cc/min injectors. . . so I think both sets of injectors I've used in my crx have probably been wrong. I read that the 88 uses a longer injection signal for the lower flow injectors. Perhaps if I swap the ECU out of the 90 crx hf then it would send the shorter signal to the injectors that i need so i'm not spraying the extra 24% gas into the engine.

mrmad 07-08-2007 05:48 PM

I've heard the 88 used different sized injectors, but are you sure of the sizes (180/235)? I thought they were 190cc for the 88 and 240cc for the 90. This is just what I have heard, so not sure here.

88HF 07-08-2007 07:25 PM

I found the info here: https://www.accordinglydone.com/data/injectors.php
but now that I look at it, says 89 is same as 88 even though I read elsewhere they were different.

88HF 07-08-2007 07:47 PM

Also here: https://www.importperformanceparts.ne...lus-acura.html

GasSavers_bobski 07-09-2007 05:28 AM

According to HondaAutomotiveParts.com, HF uses the same injectors 88-91, but they are different part numbers than the injectors used by the Si. I know the Si, and most port fuel injected Hondas/Acuras for that matter, use 240cc/min injectors. I seem to recall reading that the HF injectors are 190cc/min.

88HF 07-09-2007 05:50 PM

Where did you read that? I'm just going by the only information I can find and the difference between 235 and 240 isn't that much. I don't see why these two charts would be wrong. I use that site also, I didn't like how they used to calculate shipping without telling me what it would be. Now they've fixed that.

GasSavers_bobski 07-11-2007 04:52 AM

I'm not sure. Probably posted on one of the CRX enthusiast sites. I seem to recall 240 being molded into the injector plastic, but I can't find my loose injector sets to confirm that.

GasSavers_DaX 07-11-2007 06:53 AM

240cc/min is a common injector size for Civics.

88HF 07-11-2007 09:06 AM

Well, maybe if I could read Japanese, but there are no numbers on either set that I have.

GasSavers_bobski 07-11-2007 11:35 AM

Ah, k... I'm probably thinking of DSM injectors.
The 5cc/min difference could easily be accounted for by variations in stock fuel pressure. 2.1%... That's less than 1 psi at typical Honda pressures.


All times are GMT -8. The time now is 03:54 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.