FPCU Fried, Repairable? (Pics)

[Jesda]

Can I buy the fried component and repair this FPCU? The board appears to be blackened.

-Jesda

[Altiman94]

does work at all anymore?

[metaverse3]

Seems like a deep fried zener diode. You might get lucky and be able to resolder the burnt component with an equivalent replacement..hopefully it did not burn out the trace. You will never know until you try. I can tell you that I recently resoldered a power connector that looked just like that on my rheostat switch - J30T. Fixed the dimmer issue. Try it..the part should not be more than a couple of bucks..

[SFBayQ45]

Jesda - It might be more prudent for you to bet on the following ebay item below. I was thinking of betting on it in order to keep it as a spare, but I'll back off since it appears that you need it more than I...

http://cgi.ebay.com/ebaymotors...%3AIT

[Jesda]

Thanks!

Altiman: Its completely dead right now. Got two good spares though.

[Q45tech]

Everybody should have 2 good spares if they don't change pumps and clean out tanks with every replacement..............just shows how bad [dirty] the gasoline we buy is.

[Q451990]

I found the parts online for about $10 - but I'd have to find the list to know where... My thought was to bybass the burnt lands to the point that they're good again and then solder the leads to those locations. After I found a replacement FPCU I never spent time on the project...

Heath

[Q45tech]

Picture is the best example of the fact of the pump motor drawing excessive current............as transistors rarely fail if operated within design parameters.............they have 50 year lives.

Every electrical engineer understands how motors fail [Fuel PUMP, starter, windshield wiper, HVAC inside and condenser fan, windows, seat, sunroof, etc. Motors have a finite life and should be replaced with age.

Finding matched set components or specialty ic's with no cross reference [Japanese] is an extreme task.

Just buy a few used controllers and with new pumps changed at the first sign of noise you should be good for the next 20 years.

With a clean tank and Clean Gasoline 8 years is the norm life, but I have seen second, third pumps fail in 2-4 from not cleaning tank and replacing all rubber fuel lines. FREQUENT fuel filter changes at least once per year are the key requirement.

Just part of annual $3,000 maintenance and repair budget.

All fluids [plus oil every 90 days], air filter, fuel filter, general MAF, TB and plenum/egr cleaning [once clean [spotless - only takes 15 minutes per year to keep it clean]]. $600 plus brakes and tires and prorated belts [every 3 years and prorated spark plugs every 4 years should allow you to put $1,000 per year into a Q45 Medical Savings Account to REPAIR the failures.

Not putting the $1,000 away leads to shock when the $3,000 transmission comes due.

When everthing is perfect [$3,000-$6,000 initial cost because you bought the car so cheap] just put 15 cents per mile driven every day in the piggy bank ------------you'll have enough.

Guess people have a hard time understand that buying a $2,000 car means you owe it $6,000 or more...................when you drive it off the lot!Or you could just buy a more perfect less abused one for $10,000.......you pay either way in capital cost plus interest or weekly via maintenance and repairs.

I'm always harping on this, having seen too many people get over their head quick......thinking a 15-10 year old Q or Lexus is cheap to own.

It costs ALMOST as much as a generic [average new $28,000] BRAND NEW CAR to operate plus extra time for repairs.........can be cheaper if you do work yourself. Annual tax/title and insurance, and interest are the primary savings in a used car...........the lower payments [for used] are often offset by maintennce and repair costs.

[Blipman]

Have a look at this:http://aus300zx.neuralmotion.c...u.htm

Note it's for a 300ZX Z32 FPCU but might still have useful info for you.

Ben

[Altiman94]

ah so you are just trying this to see if they are repairable. Try it out and get back to us. It cant be too expensive for one lil diode youd think

[Q451990]

Alright... here are my notes. Hopefully this helps if someone wants to try to rebuild and has more time than me.

http://www.nteinc.com

Qty 2) NEC K591 = NTE 2985 Qty 1) NEC 14305 = NTE 960 Qty 1) FMU 245 = NTE 624

R-K Distributing Company. http://www.r-k.com

NTE 2985 = $2.32eaNTE 960 = $3.73eaNTE 6241 = $5.56ea

Who knows if the rest of the components are OK. I'm not an electronics tech. so I really don't know how to test most of these. My thought was to replace what looks fried and see if it works. For $15 in parts it's worth a try... Hope this helps!

Heath

[aaronl]

A car audio repair guy should be able to do this repair for a resonable charge. The technolgy and the parts are similar to audio power amps.

[Jesda]

Shipping it to a friend of mine to do the soldering (I really suck at soldering). We'll see how it goes!

[Q451990]

my thought was to just go far enough back on the lands on the board to have a surface to solder the leads to... basically replacing the burnt area of the board with the excess leads. You should be able to scrape off the coating on the lands and prime them with solder to let the leads of the components solder down.

Heath

[Jesda]

Two parts on order. ETA 2 weeks. $4 each!

[aaronl]

hey Jesda email me for address and ship the box to me I will repair it for you.

aaronl

[redmanfx]

Hey Jesda, Do you know how many fuel pumps your 92 has been through? As far as I've researched mine has only had one replacement in 98 and I can't imagine my fcpu lasting much longer. I'm hearing my fuel pump now. I'll check, but I seem to remember someone having something like three spare fcpu's for sale. I'll have to figure out where I saw that.

Have you had to relplace your antenna yet?

red

[Jesda]

aaronl: Its already in the hands of a friend of mine.

redmanfx: Ive had the one that came with the Q when I bought it in 03, the one I replaced it with, and the one I'm on now. Then of course I have my trusty alligator wire. Antenna I think is original. No records indicate replacement on it.

[redmanfx]

Wow. It makes me feel good that things have lasted a while on my car. I hope that the replacements last just as long.

red

[Q-less]

About the antenna: I refrain from using it in the winter and especially if it is below freezing. I freak out every time I look back and see it 'stuck' halfway up or down. I just use CD's or if you still have bose make some good cassettes. If you grease it up real good it should slide pretty easily though.

[96Qowner]

Be sure not to lubricate the antenna mast itself - it just helps attract more junk. Clean, clean, clean is best. WD40 it and wipe, wipe, wipe, run it up and down, wipe wipe - get it all shiny and dry.

[Jesda]

I use XM through a tape adapter. Never been a problem, but now its a problem pre-solved.

[911/Q45]

Be sure not to lubricate the antenna mast itself - it just helps attract more junk. Clean, clean, clean is best. WD40 it and wipe, wipe, wipe, run it up and down, wipe wipe - get it all shiny and dry.

Don't use WD40! It reacts with the black plastic at the base of the antenna and ruins the whole assembly.

[Q-less]

how 'bout some chicken fat

no really, I bet over half of us have lloked back in our rear view mirror and seen the halfway up antenna

[Q-less]

Your thread title reminds me of Kentucky Fried Chicken. I can't be the only one

[Q451990]

Alright... here are my notes. Hopefully this helps if someone wants to try to rebuild and has more time than me.

http://www.nteinc.com

Qty 2) NEC K591 = NTE 2985 Qty 1) NEC 14305 = NTE 960 Qty 1) FMU 245 = NTE 624

R-K Distributing Company. http://www.r-k.com

NTE 2985 = $2.32eaNTE 960 = $3.73eaNTE 6241 = $5.56ea

Who knows if the rest of the components are OK. I'm not an electronics tech. so I really don't know how to test most of these. My thought was to replace what looks fried and see if it works. For $15 in parts it's worth a try... Hope this helps!

Heath

I did a search for this thread because I couldn't remember http://www.r-k.com - only to find that the site is down. I don't know if they're out of business or not.

Anyway, I found another site that also sells these parts. http://www.mouser.com

Heath

[maxnix]

Don't use WD40! It reacts with the black plastic at the base of the antenna and ruins the whole assembly.

I use WD40 applied to a clean rag to clean the antenna while it is up. Then I lubricate it very carefully (not to excess!) with a very light machine oil on another clean rag while it is run up and down.

My wife loves to listen to the radio, so I make her do it every week or two (riiiight, sure I do). I only do it every month as I very seldom use the radio.

[Mark86T]

With a clean tank and Clean Gasoline 8 years is the norm life, but I have seen second, third pumps fail in 2-4 from not cleaning tank and replacing all rubber fuel lines. FREQUENT fuel filter changes at least once per year are the key requirement.Just part of annual $3,000 maintenance and repair budget.All fluids [plus oil every 90 days], air filter, fuel filter, general MAF, TB and plenum/egr cleaning [once clean [spotless - only takes 15 minutes per year to keep it clean]]. $600 plus brakes and tires and prorated belts [every 3 years and prorated spark plugs every 4 years should allow you to put $1,000 per year into a Q45 Medical Savings Account to REPAIR the failures.Not putting the $1,000 away leads to shock when the $3,000 transmission comes due. When everthing is perfect [$3,000-$6,000 initial cost because you bought the car so cheap] just put 15 cents per mile driven every day in the piggy bank ------------you'll have enoughGuess people have a hard time understand that buying a $2,000 car means you owe it $6,000 or more...................when you drive it off the lot!Or you could just buy a more perfect less abused one for $10,000.......you pay either way in capital cost plus interest or weekly via maintenance and repairs.I'm always harping on this, having seen too many people get over their head quick......thinking a 15-10 year old Q or Lexus is cheap to own.

Well, my dad is attempting to prove all that maintainance stuff wrong by doing little to none for the past 85,000+ miles. He bought his 91 Q with 50,000 miles on it (it now has 138,000+ miles) and last year I had to shame him into bringing it to me to let me do SOME maintainance on it. I did the transmission filter/fluid/plugs/water pump/4 rotors & pads/belts/PCV. That's all I could get him to let me do. Things I wanted to do were fuel pump as it was very loud, timing chain guides & power steering pump as his Q steers like a truck. He drove it 2,300 miles to me & then 2,300 miles back home. Part of his vacation. He won't listen to me about it being a ticking bomb with the fuel pump & chain guides. Said he's driving it till it dies. Only good thing about it will be that I will part it out when it goes. SOmething here about old dogs & new tricks rings true.

[natsoundup]

Can't figure out why no one is interested in my FPCU from the 90.

It's perfect, and a cheap insurance policy.

[Jesda]

Drop me a price. [email protected]