87 k10 350 tbi tuning?

[JohnnyPopper]

Well Captain, that makes the most sense, since the pump is at the bottom of the tank, and the rubber hose connects the hard line. I hear what sound like circulation, which is probably spraying out of the rubber hose, and accounts for such low pressure.

I found a inline fuel pump from a Benz I had, it measures 50 psi full throttle. Thinking about locating it post fuel filter where hard line converts to rubber.

I'll keep you posted, and THANKS!

[JohnnyPopper]

She Lives!!!

So I placed a pump inline by extending the rubber fuel line, and back then back to the TBI.

It works on both tanks.

Haven't heard her run for months!!!

[Shifty]

Good to hear that she's up and running!  Cheers! 

[JohnnyPopper]

Thanks!

Took her up to the car wash for a long overdue scrubbing.

[JohnnyPopper]

So I took her for some new sneakers on the rear dually's, and she started to choke up, lost power and threw code.

44, so I guess she's running lean? I already changed the 02 sensor.

Looking on ebay/amazon for a OBD1 right now. 

[VileZambonie]

Why did you use that fuel pump? You need to push the fuel not pull it and you need a steady 13 psi

[JohnnyPopper]

Well I didn't see this pump as a permanent fix. I will get the tank pumps replaced.

It would seem that under load the volume required is impeded by the hose decay between the tank pump and the pick up tube.

[JohnnyPopper]

Another theory-

Probably had 2-3 gallons, so with the level so low, the secondary pump was most likely drawing air into the damaged hose.

Primary only delivers 5 psi at the moment, so we had a diluted mixture of air and gas.

I bought some 'catcleaner' additive, added 2 gallons, drove for 12 miles, mixed fwy and surface, avg 45-65 mph.

She cleared up nicely after about 5 miles. Filled her up with premium, now let's see if she passes smog...

Oh, and the 32.00 OBD1 doesn't do anything but short 1+2, just like my paper clip!!!

[VileZambonie]

Right, a code reader is not a scan tool so don't waste your money on one. "Premium" will not help with emissions. In fact it may cause your HC's to increase.

[JohnnyPopper]

So VZ, is there a OBD1 that actually scans? Or do we just have to count the blinky lights?

[Mike81K10]

I have an INNOVA Scan Tool 5610 and it does very well on my vehicles made in the 2000s, as for 80s and 90s vehicles there may be additional attachments that can be purchased. It is used with my phone and does a lot. It will break down codes and helps to troubleshoot problems, has many features. You can look it up on line. There are others good ones as well I am sure.

[VileZambonie]

Here's an old auto x-ray on eBay for under $100 bucks! GM Ford, Chrysler OBDI and OBD2

https://www.ebay.com/itm/155526360331?hash=item243617ed0b:g:dpYAAOSwxsBkSs~G&amdata=enc%3AAQAIAAAA4L%2F1vG0o7352evzDnsbYRqFP477mrtHD8BNgp74qLWyKs3oHwea0n82wmk4Z6bfJd6RFL1v6Hp0fFXX0SArm9kTBRS%2B12TcP%2BFPZr%2BB1bqZPd4Xf%2BvhLLy40DA0XDqgvQjer7Q7FfzA5ayIy8tN3edcvxRAdVhqDgviic7Rrr9FQyaPLg2Elk5eSf%2Fn6i9iiIaNlXYcJMJAmervC4RgxAkvVqN%2BDuLQq1VgorepAONyR5wAzeMhFixzlYwnifAktWGKgfS1EQ4hI0zXsuE%2FAOxkhAZL%2FyEMPOHdhIu02qX%2Fz%7Ctkp%3ABk9SR8bl9vyJYg

[Mr Diesel]

I have read the OTC 2000 works for the primitive diagnostics available on OBD1. Here is a set on Ebay that includes GM TBI brainbox.

https://www.ebay.com/itm/233795455727?_trkparms=amclksrc%3DITM%26aid%3D777008%26algo%3DPERSONAL.TOPIC%26ao%3D1%26asc%3D20220706173935%26meid%3D79c381f765914eb0a9180413dab6d644%26pid%3D101526%26rk%3D1%26rkt%3D1%26mehot%3Dnone%26itm%3D233795455727%26pmt%3D0%26noa%3D1%26pg%3D2380057%26algv%3DRecentlyViewedItemsV2Mobile%26brand%3DOTC&_trksid=p2380057.c101526.m146925&_trkparms=pageci%3A61b5d1e3-fa95-11ed-b904-1649b703dc1e%7Cparentrq%3A505dc0541880aa7145e3f636fffcd937%7Ciid%3A1

[JohnnyPopper]

Thx guys! Will let you know what happens!