Honda D Series Failed Fuel Pressure Regulator

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Troubleshooting engine crank, no start.
Years later, I think this was actually due to a failing relay (?) or something electrical to do with main relay circuit. It still exhibits this behavior.
While trying to hunt the issue down, found this odd fuel-system pressure regulation behavior which I think was unrelated, but was good to get taken care of.
notes from service history
8/1/2020 ODO 210,000 Wondered about occasional difficult cold starts. Extended cold-start cranking. Battery tests OK. Haynes' book recommended checking fuel system pressure. Gauge borrowed from O’Reilly’s. Fuel pressure shoots immediately up to 40+ when key turned to “ON” from no fuel pressure. Pump OK? However, disconnecting the vacuum line from the fuel pressure regulator reveals a very sluggish reaction in fuel system pressure. I think it needs a new Fuel Pressure Regulator. Ordered along with an oil filter and drain plug gasket.
i miss this car so much. d-series honda (1995 del sol)
forgot i'd made this video. here it is.

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6 июл 2022

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Комментарии : 18

@Venumousll 12 дней назад

and yet you didn't record the new readings of pressure........did they rise, stay the same?

@ceckoslav Год назад

Did you measure the pressure after the replacement?

@M3GAN3116 7 месяцев назад

Thanks 👍

@AA-vc8mi Год назад

Basically what was the symptom that made you test the fuel pressure regulator? And what happened after you replaced it ?

@16mmDJ Год назад

There wasn't actually a definite symptom. I just noticed it when trying to sort out why the car had trouble starting sometimes. I think that was potentially due to a sticky main relay, though cleaning that didn't change it for long, either. This car had a security system and a cutout switch, I don't really remember what else I tried 😅

@saxophonias Год назад

Sadly I can't source FPRs in Europe for d-series. Any ideas?

@16mmDJ Год назад

Really? Try Ebay perhaps. Where in Europe? I'll pin this comment so hopefully others see.

@ballsofdoom3124 Год назад

Is it ok to leave the hose off? I noticed on my 2000 civic ex the idle is way too low with the hose attached. I removed it from the intake side and now it idles high but no longer stalls out like it did.

@powerbuffboy9510 4 месяца назад

I wanna know that too mine does that too.

@ballsofdoom3124 4 месяца назад

@@powerbuffboy9510 I've been driving it that way for almost a year now and no issues except a rougher than normal idle. It stays around 1k after it warms up in drive

@powerbuffboy9510 4 месяца назад

@@ballsofdoom3124mine goes down to 400-500 when it warms up and when i unplug it it goes to normal 1k rpm.

@ballsofdoom3124 4 месяца назад

@@powerbuffboy9510 Mine got as low 200rpm with the hose attached and one time it stalled when trying to park. I just leave ot off... if anything my fuel economy might take a small hit

@vicinvesta8349 Год назад

Did replacing fuel pressure regulator help any? I am chasing down poor MPG on 1997 Civic LX. Same test as you did shows no change in fuel pressure is I disconnect (and pinch) vacuum line to fuel pressure regulator. Manual says "pressure should go up". Other than poor MPGs (25) and somewhat high idle ~ 900RPM I do not experience any issues. I did all the usual checks - adjusted timing, cleaned throttle body and IACV, replaced PCV, ran Lucas injector cleaner through the system. Compression test shows: Cylinder/PSI: 4/145, 3/150, 2/165, 1/178. Difference between cylinder 1 and cylinder 4 is 33 PSI. Kind of high. I am out of ideas. Was thinking to ask you before shelling $100 for fuel pressure regulator.

@someguyto4675 Год назад

Im experiencing a no start in mine for some reason. Im not sure if the regulator is bad. I put a rebuilt engine in it like 5 or 6 weeks ago. It turns over but wont start. It needed a new fuel pump which I replaced so I know it is getting fuel to it. turns over but wont start. It almost starts but does not. Any ideas what my problem is?

@someguyto4675 Год назад

@@city2city100 I figured out what the problem was. It was not he fuel pressure regulator. Spark plug wires on mine were actually wrong. Now im getting a real mild whining noise from the timing cover and cant quite figure out what it is. If I run it without the timing cover It dont do it at all. I tried it with no drive belts installed and it still makes a whining noise.

@faiekadams2624 Год назад

Where can I get that book

@16mmDJ Год назад

Good question. This is a Chilton's Haynes manual. I go to their website and search for my model year of car... so in this case 1995 Honda Civic brought up the book "Chilton 30200". I then stick "Chilton 30200" into Ebay and buy the best looking option :-) I personally find the Haynes books easier to organize my brain around, but both the Chiltons and the Haynes are excellent resources.

@faiekadams2624 Год назад

Thank you sir