Norilsk

So I realize there are plenty similar questions and I've gone thru most of them here but I still can't solve my problem.

I have 1993 Toyota pick up truck 22RE that doesn't run on it's own unless I keep feeding "quick start" into intake, which would point to a dead fuel pump or fuel not getting, but fuel pump is working and fuel is getting into cold injector.


Things I've done so far:


1. Replaced spark plugs
2. Replaced spark wires
3. Replaced fuel injectors
4. Checked AFM sensor and everything within FSM specs.
5. Checked throttle sensor everything is withing FSM specs.
6. Checked any loose wire and ground, everything is fine.
7. Checked fuel pump B + Fp, fuel pump is working
8. Checked cold start injector, fuel is getting there.
9. Replaced fuel filter.


Things that are shady:

1. Engine light does not appear when I jump the wires - dead ECU ?
2. I opened the top of the AFM sensor and manually moved the lever, can hear fuel pumping, but when I crank the engine it does not move on it's own - dead AFM?
3. Ordered new COR just to eliminate the possibility of a bad relay, this truck was a cottage truck for the past 5 years and sat in the forest, maybe moisture did it's job with that relay given how bad the floors are on the thing that I have to re-do them.

Any tips which way to look and what to check next?

Co_94_PU

iTrader: (-1)

Does the engine lamp come on at all?

The vafm requires the engine running above a certain rpm, hence the COR.

If you jumpered the fp lead and it didn't run you problem isn't (solely) the COR as that's what's bypassed.

It's probably just due for a good cleaning of the fuel system since it runs on starting fluids.

You'll want to check that lamp/bulb, maybe for injection pulses out of the ECU.

Pull the fuel return off the regulator and plumb it into a larger bottle, I forgot the number however so.. You'll have to hunt or wait for someone to post it. Think it is in the 3-500cc range

Norilsk

The light does not come out at all, hence I suspect it could be ECU (don't have spare one so I can not test it).
I did jump the Fp and the engine still not starting on it's own, even thought I have good pressure when I open cold start injector.
I opened the gas tank and it looks very clean and absolutely no rust, hence I don't think fuel lines are clogged.

Seems to me it's a chase of electical gremlins now in ECU.

thefishguy77

iTrader: (1)

Replace the bulb for the engine light. Its cheap and shouldn't be to hard. When you replaced the plugs did you take pics of them or still have them? Might help us understand whats going on in the motor. Having fuel at the motor doesn't ensure you have enough fuel pressure. I have read plenty of threads where the guy wrote off a fuel problem because they was "pressure" only to chase the same problem for a month or more. Then getting a fuel pressure gauge and finding the motor was only getting 50% of the fuel pressure it needed.

Norilsk

Will try replacing the bulb and checking the fuel pressure.
I did not take any pictures of the plugs , but there was nothing suspicious by the looks, I measured the gap and it was at 0.40


This truck sat dry in the forest (no gas in the tank) for one year without starting or any attention to it.
Nobody done any service to it in the past 5-7 years at all.

thefishguy77

iTrader: (1)

It probably needs a good cleaning. You replaced the fuel filter correct?

Norilsk

Yes, the fuel filter is brand new. I am waiting on the fuel pressure gauge to arrive to check the pressure and new COR to swap with old one.
Gas comes out clean from cold injector I checked.


So far what we have:

1. Possibly low fuel pressure - going to check
2. No engine light, burnt? - going to replace

thefishguy77

iTrader: (1)

Good on you for doing it right.

Norilsk

So I checked fuel pressure everything is within norm
Took apart dashboard to replace bulb - still no engine light...
Checked all fuses and they all fine.
Checked all grounds, cleaned and tightened them.



What next?

wyoming9

iTrader: (1)

Get some noid lights sounds like the injectors are not getting the signal to open

Did you get the correct injectors??

The early ones were different .

Norilsk

I do have correct injectors and engine runs with a constant "quick start" spraying into intake, so could that be the AFM not sending signal?

Norilsk

UPDATE, for those who are interested or have similar problem


It was combination of a faulty AFM (replaced with 89 T4R one)and fried ECU, replaced it with the exact one.

Truck is running now.

wyoming9

iTrader: (1)

What caused the ECU failure ??

A voltage spike or getting water inside are about the only things that will cause a failure

Norilsk

I would place my bet on the moisture inside of ECU, since there are barely any floors in this truck and it's been sitting for 5 years in the woods.
After replacing ECU got my ECL with the key in and it runs like it should now. Now onto making new floors for this truck!