MAXIMUS1968

I have had all of the symptoms and i have been following this thread will i accidently think i found my problem

I have recently replaced all of these parts and did maintenance on my 94 Toyota 22Re, auto tranny

Adjust TPS
Valve Adjustment
Timing Chain Replacement
Denso Iridium IW20 Plugs
Distributor Cap
Rotor
8mm Plug wires
Water pump
Belts
AFM Adjustment
Battery
Alternator
SeaFoam Treatment

I have had a problem with my timing in the past i couldn't get it to stop pinging unless i put the timing on TDC. I had to put a alternator on it today because the battery went dead yesterday and i drove to work today and the alternator started raisn cane. When i got it replaced the idling was off and was running way to fast and surging. I adjusted it down and reset the timing to spec 5*BTDC and VOILA!!!! No pinging, does this make any kind of sense???


I had posted this the other day, but i wanted to show my results

bodo

I know you said you've run 91 octane and it worked before and now it doesn't, can you get 93 octane in south FL? Mine pings some when I gas it on 89 octane but none on 93. The reason I'm not keeping this conversation private is if someone figures this out it will be in the search. Oh yeah my motor has about 1400 miles on it so I don't think carbon is an issue.

ovrrdrive

Actually I do run the BP 93 octane in it. As a rule of thumb I've always ran 91 or better in it and that is usually indicative of a "premium" fuel. That's why I usually say 91. The junk in the trunk right now is indeed BP 93 and it pings like hell.

ovrrdrive

The head was a remanned head with absolutely no carbon at all on it, but I did a half assed job of cleaning the piston tops when I had it apart. I scraped 1 and 4 pretty well but I was a little skittish with rotating the engine at that point to get at 2 and 3 really good so I just scraped with a razor blade at them in the bores and vacuumed out the crap.

I didn't know about the 3m pads when I had it apart or I would have used them. Hindsight=20/20 you know...

The pistons weren't bad but there was some carbon left on them. No where near as much as when I went in (which wasn't a lot btw) but there was still some.

ovrrdrive

So, are you saying that it was the alternator that ended up being the problem or did you accidently do something while you were changing it to fix the problem?

That's quite a repair list you have there...

ovrrdrive

By the way, for the record I did put the AFM back to the stock position. It was evident it wasn't helping and it was a little rich.

Currently I have the AFM in the stock position and the timing at 5 degrees shorted. It's gettig where the weather is cooling off finally and it only pings when the temps are over 85.

Seeing as how this is so temp related, I am starting to consider the 180 degree thermostat again... Couldn't hurt to cool things off a little more.

Btw Bumpinyota, the only reason I'm not all over the wmi is that the engine doesn't come with that stock and in stock form it doesn't ping. Rather than bandaid the problem and work around it I'd like to nail it and get rid of it. Before I start throwing money at it with sensors and water injection kits, I'll tear the 22re out and drop in a SBC with an auto. Then I'll detonate the 22re in my own way...

MAXIMUS1968

It all stopped when i put the alternator in....yes it had my idling all acting up so i went and throwed the light on it and jumpered it , i set it to factory pec and set the idling {which i have never been able to do} until the alternator change. I'm not saying this is everyones problem by NO means, but it miraculously fixed my problem. You can see all my list above that i had done to the truck,

ZUK

iTrader: (1)

overdrive---I was plagued with the same ping prob in my 92 shortbed Yota 22RE....I had to run premium to minimize the prob. I did notice that when I sprayed a whole can of the injection cleaner in the intake while the engine was running that it ran "better" and pinged less. But I never got rid of the problem.

rdharper

Overdrive: First, 20K ohm range is ok. But note the following:
On that scale 0.3kohms means 300 ohms
Most DVM's have a range select and an autorange. If you are really holding the range at 20kohms, and you are reading the meter correctly, then most of the readings are not right. If you are using an analog meter, you may be looking at the wrong scale.

The IDL to E2 you can think of as a switch. It eithers reads very low, or infinite.
This input is to tell the ECU that the TPS is indicating either an idle position or not. The usual readings are 17-20 ohms in the idle position, which would be 0.02kohms on the 20k scale (despite what the chart says).

Also, you can think of the other reading, the VTA-E2 reading as a throttle angular displacement reading, with 1ohm per rpm, on a linear scale.

So an Idle of 800rpm will read about 800 ohms (0.8kohms) and linearly up to WOT of 3 or 4 Kohms. What you are showing is 0.32Kohms or 320 ohms, which is way off of a full wide open reading. 320 ohms would be telling the ECU that you are at 320 rpm roughly.

If those readings are correct, then you would be totally confusing the ECU. I would think you'd throw a code, so the problem may just be your readings. But I'd check it again if I were you.

YotaJunky

ovrrdrive,

Thanks for the PM. I just reset my TPS. Apparently, it was off enough that I'm hopeful it will resolve my pinging issue. I won't know until I take it out on the highway or steep incline and push it hard. I'll let you know how it goes.

Troy

ovrrdrive

Might as well revive this old thread because with temps now going over 90F outside I'm pinging like a washing machine full of ball bearings...

The winter was pleasant for the old girl... Power was great and it rarely ever pinged, but that's all over now.

On my list:

Change EGR and related sensors finally
Upgrade to a better alternator
Throttle body cleaner
Adjustable cam gear


Those are things I've been told to try that have helped out others... After that I'll probably just start changing random sensors like the O2 and knock etc.

I don't want to go through another summer like this.

Jay351

Wow, that really sucks!
I have been running my truck on 86 forever, runs great, no pings
I might treat her to a tank of Chevron 94 octane one day, see if that makes any difference..

Regular is 1.21 a litre right now though

YotaJunky

Update: I've used 4 cans of GM Top Cleaner and ran about 4 liters of sprayed water through the brake booster line. Pinging has decreased significantly. I would say at least by 75%.

I think I must have had a lof of carbon in the combustion chamber and on the valves.

Troy

jdpagan

have you had any luck yet? i have a 94 4x4 pickup with the same problem. it runs great in the morning when its cool and crappy in the afternoon, mostly pinging under load in 3rd and 4th in the middle of the throttle. it doesn't ping when its floored but it does heat up a little. it didn't ping when i bought it but after a few months of running cheap arco gas it started.

YotaJunky

Yes, my truck is running much better. After trying several different products: seafoam, GM Top end cleaner, I found that spraying water into vacuum lines going into the intake worked the best. It pings far less now. I'm quite sure it was an issue with built up carbon deposits.

Troy

ovrrdrive

I've had other priorities lately and haven't had the cash to work on it.

I can tell you that my problem isn't carbon though because my engine only has about 18k on it...

If I ever get caught up and start working on it expect updates to this thread.

ernest t bass

my 1990 2wd xtracab 22re automatic had same problem with needing super unleaded fuel. it would ping on anything else.
it did at least run well on super.
i bought it with 105,000 and at 140,000 did a top end due to leaky valve stem seals causing fouled plugs.
another top end at 205,000
mechanic never could figure it out and blamed it on too high of compression.
i can afford a head gasket job for my 3.0 with the money i save not buying super.

ovrrdrive

Well, I may have found either the problem or possibly a work-around...

I recent had some climbing temps going on so I started troubleshooting the cooling system. I did a new cap first, then a tstat being sure to get a 180 degree one, then I bought a water pump but didn't get around to putting it on right away, a week later the rad finally cracked all the way through so I replaced it and put on the new water pump at the same time.

Now my temps are down where they are supposed to be and for some strange reason I can barely even get the engine to ping at all. If I really feather the gas just right I can get a very slight ping to start but I have to do it just right. The constant loud ping is gone.

I'm thinking what's left is due to either slightly high compression or a crappy alternator. I'll probably do a GM conversion soon and see if that fixes it the rest of the way, but I'm in no hurry now. It isn't a problem anymore.

Bumpin' Yota

hmmm that would do it, abnormally high temperatures! Congrads on the fix!