90Q fuel pump controller

[Clipboard]

Well, I did it - again! Waited too long as the fuel pump noise grew. Replaced the pump and filter, but the controller is el-toasto. Dealer wants US$650+ for a new controller. As the limp-home mode is to bypass the controller and run the pump at constant (full) speed and I'm retiring the Q to winery duty in about 8 months, can I just run the pump without the (way over-priced) controller??TIAjohn

[Q45tech]

Till the new pump fails again, won't be covered by parts warranty hope it last 6 months. Not sure if the fuel pressure regulator can regulate such high volume presure at idle cruise {?}.

[Rex]

Would this work, versus NOT replacing it at all??

[Clipboard]

So...that's a NO ? The local dealer asks US$651.97 for a controller. Are there any NICO ad dealers that can beat it, or don't they actually monitor the Q chatter? I can wait for overnight as it's been in the shop for a week already. I suspect that the pump controller varies the pump output volume/pressure by controlling the pump speed based on a parameters map and that the pressure regulator is a simple injector flow demand vs excess fuel dump-back to the tank. Most EFI that I am familiar with have a constant speed/volume/pressure pump and the pressure regulator handles flow/pressure across all operating conditions. (The Kf MFI on early 70s 911s and racing Porsches had a belt driven variable speed mechanical pump.)I appreciate your replies, BTW - there's not a lot of bling attached.TIAjohn

[Clipboard]

Rex!!! (not THAT Rex)Thanks.john

[Rex]

Make sure you add your screen name & ebay handle to the sticky, so you don't get into a bidding war with an other NICO member.

Good Luck.

[Clipboard]

Since the sticky is both new to me and bloody long...Clipboard is 935pork on eBayThanks for the tip Rex (not THAT Rex)john

[Jesda]

What does the big number on top of it mean? Mine says 07. The one in that ad says 03.

[Q451990]

Here's the price from one of our sponsors. I would check with some local salvage yards for a take-out. The last one I bought was $50.

Heath

http://www.trademotion.com/par...gid=1

[Clipboard]

Thanks, Heath. The wierd thing was that I had downloaded the Fuel Pump failure info during the day. Went out to go home and she cranked, idled for a little bit, then nada.john

[squeefoo]

Why not take the controller out and see if the pin/board/connector is in need of repair? Alot cheaper than just buying new or used.

[Clipboard]

Good tip and my first thought. But...when I said el-toasto I mean it. 4-5 fried spots and one transistor is blown off the board. I'd rather get a whole assembly.john

[greg_atlanta]

Is there only one electrial connector on the unit?

Are there only two screws which secure the unit? Easy DYI, I presume.

I'm considering replacing mine because of some slight weirdness after replacing the fuel pump.

[Jesda]

Greg:

Hurry before it leaves you stranded! (Like it did to me).

Its in the trunk right above the fuel tank (pull off the liner). A couple screws hold it in place, and theres one easy connector. Takes about 5 minutes at most.

-Jesda

[Q45tech]

I always keep spare modules [fpcu, ecu, tcu, pscu, hvac, etc assorted every fuse, wire and a VOM and mini FSM plus FUEL FILTER] in the trunk, never tell when you are out of town [vacation] and need one. Every city has independent shops [a lift and some tools] that can help but not without the correct part and manual.

Even though I have spare MAF, TPS, CAS, IAC, EGR and Evap, injectors, you name it - never carry too much in trunk.

[greg_atlanta]

Did yours fail after replacing the fuel pump? Did it act weird before it failed, or did it just fail?

[Jesda]

Mine failed about 20 miles after the pump was replaced.

[pito11213]

interested in selling any of those injectors q45tech?

[rixkix]

If you want mine, you can have it for $30 plus however you want it shipped. I don't know how to take credit, but I can take paypal at [email protected], but if you can't, just give me the address you want it shipped to and we'll work out the payment later (money order or something) (760)608-3101

[Clipboard]

rixkix You talkin' to me? Cause if you're talkin' to me, I'll take it!john

[rixkix]

Clipboard - Yes, call me or email me so we can work out the details.

[Clipboard]

Will do - thanksjohn

[greg_atlanta]

My car acted funny for about a week after replacing the fuel pump (lost power at mid-RPMs when accelating), but I cleaned the contacts for the pump, relay, and FPCU and it cleared up. I've got at least 3 months before any roadtrips, so not worried about being stranded. If it holds up for a few more weeks I'll consider it OK.

[Clipboard]

Hey Rix!Controller arrived about noon today and I ran it over to the shop. I'll let you know the rest of the story - soon I hope.Thanksjohn

[Clipboard]

RixkixThanks a bunch! Picked her up at noon today and she runs like a Q is supposed to. No fuel pump noise. Quick start. No hesitation between shifts. No bog when the throttle is mashed.Everybody else: if you've got these symptoms - replace the fuel pump.Thanks again and good luck with your part-out.john