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View Full Version : 20v ST is down.



KM
06-20-2010, 08:55 AM
Spark, fuel, compression (or atleast back pressure)? It's all up in the air.

I haven't been driving it lately, as I work from home and when I go places, I'm usually with Becky.
I have most of the exhaust on. Cat then resonator, then piped to the trunk area. Or actually right where the wheel is.

Joe had intermittent issues with the car starting before he sold it to me.

Now it's been fairly narrowed down to the circuit opening relay as the culprit.
Can't test anything else until I get a new battery, since the one I bought 6 months ago is dead from troubleshooting or something (the battery, starter, and alternator all tested good last month).

Unfortunately, the celica isn't the priority car. Becky's Accord gets first dibs, since she drives it 100 miles a day (and we just spent $300 getting one of her rims fixed and a new tire).

Anyway... while I'm venting, does anyone know what the part number is for a circuit opening relay (located next to the ECU), and whether or not the relay is different between models?

andy
06-20-2010, 09:25 AM
you should be able to use one from any 90s toyota car.

93celicaconv
06-20-2010, 01:28 PM
You should be able to grab a couple from a salvage yard for a couple bucks. If you really want to buy new, I know they are expensive through Toyota.

Did you test the circuit opening relay bypass test (per the BGB) to determine your fuel pump is fine? Did you try starting the engine and did it run while doing this bypass? If so, then you know your circuit opening relay is likely the problem.

KM
06-20-2010, 06:14 PM
You should be able to grab a couple from a salvage yard for a couple bucks. If you really want to buy new, I know they are expensive through Toyota.

Did you test the circuit opening relay bypass test (per the BGB) to determine your fuel pump is fine? Did you try starting the engine and did it run while doing this bypass? If so, then you know your circuit opening relay is likely the problem.

Jumped +B and FP, I could start it and run it.

Murgatroy
06-20-2010, 06:22 PM
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KM
06-20-2010, 06:43 PM
976itytigt8eg5fij6gkofnfbh;tiotg0ggig9gh9t90ty90to 0t9tyo9g9gy90goghogog9t9t9t9t9t9t9t9totyyy mymmb b6v h234r345y454jyu3y6iutyupyo9ty9hy90y90hy0h0hh0hyo0h yo9y0yo0hyo0hyhyohy0h0h0h0hohhohophohohohohophohop hphphyp0hpohopgyhophyoho9hyohioyio8up0tr7o0tyoyogf yoo;yoypp[-5pttp0t--yptyptptptpt--t--t-tp-t-t--t-to


= :rtfm: ?

Hipster Lawrence
06-20-2010, 07:00 PM
So you are getting power to the COR but it's not working? What if you jump the relay? What commands the COR? The ign switch?

You say it will run if you jump the fuel pump test connector. I'm assuming that you have tested the afm but make sure the afm is getting good ground, that was one of the issues with my ae86.

Could be the ECU. I'm pretty good friends with mr220v over at mr2oc. I bet he has a ST ecu sitting in his garage i could borrow.

what's the part number on your relay I may have one in my bucket o' relays

Murgatroy
06-20-2010, 07:03 PM
= :rtfm: ?

It seems Rebecca was trying to help you troubleshoot.

KM
06-20-2010, 07:28 PM
Circuit Opening Relay
85910-12010
056700-8282

Actually pulling the 10mm nut and pulling the relay out showed me a crack in the casing.
Looked in the 20V BGB, that relay is different from the one I have.
I'm assuming swaps just use the existing relay?

Edit: ran the continuity test as shown on FI-217 using my Fluke 12.
I don't use this multimeters often (or really ever), and I don't know what the readings mean.

Terminals STA and E1 read 27.3
+B and FC read 125.2
+B and FP read 0.L (no continuity)

I haven't done the next step, which is applying battery to STA and E1 and checking continuity between +B and FP to inspect relay operation.

KM
06-20-2010, 11:32 PM
Well, here's something that doesn't make my celica issue quite as bad.

My mom's Nissan NX, which is parked right next to mine, has coolant in two or three cylinders. It won't idle. It needs a new clutch. New axles. New brakes. New distributor cap, rotor button, spark plugs, wires. New muffler.
But with that leak, it's not even worth tearing into.

So now I get to try to sell that (and the $500+ worth of parts I have for it already).

Colossus20v
06-20-2010, 11:41 PM
It is probably still the original ST relay as I doubt it came with my engine and ecu from venus when the swap was done.

Also, the last time it wouldn't start completely, I swapped the ignitor from a 4-Runner I think to get it going again. Then it started having the starting issues on days it didn't feel like going out.

KM
06-21-2010, 12:34 AM
Yeah, I still have that spare ignitor and coil, but I'm getting spark.
Or atleast I was a couple of days ago.

Colossus20v
06-21-2010, 06:11 AM
I wonder if this would be a good time to convert it over to blacktop electronics or megasquirt the whole setup?

KM
06-21-2010, 06:21 AM
I wonder if this would be a good time to convert it over to blacktop electronics or megasquirt the whole setup?

Honestly, it's a good time to do a chassis swap.

I love the platform, and I love the engine. But the chassis isn't in very good condition.

The brake lines, as I'm sure you know, had been reran.
The floorboard under/behind the drivers seat gave out.
The exhaust had rusted, and after hitting a speed bump, the muffler broke off its pipe.

There's signs of rust all over the underbody. I don't even get under the car anymore, 'cause I always find more.

I've been trying (at least in the back of my mind) to find a new chassis to swap everything over to.

I'm trying to decide whether I want to stay Gen5 or move on to Gen6.
If I can find a 94/95 with a blown head, I could 7age20v.

90blacktrac
06-21-2010, 06:27 AM
Hmm I have the relay left over from my mr2 I'll check it with your part number to see if its the same. P.M. your address and I'll ship it to you if you want.

Colossus20v
06-21-2010, 06:31 AM
Honestly, it's a good time to do a chassis swap.

I love the platform, and I love the engine. But the chassis isn't in very good condition.

The brake lines, as I'm sure you know, had been reran.
The floorboard under/behind the drivers seat gave out.
The exhaust had rusted, and after hitting a speed bump, the muffler broke off its pipe.

There's signs of rust all over the underbody. I don't even get under the car anymore, 'cause I always find more.

I've been trying (at least in the back of my mind) to find a new chassis to swap everything over to.

I'm trying to decide whether I want to stay Gen5 or move on to Gen6.
If I can find a 94/95 with a blown head, I could 7age20v.

I know those northern winters and salt didn't help it much. I didn't know about the rust under the driver's seat at all. Only the rear driver quarter panel, I knew was pretty bad.

I think it would be good in a 6th gen personally. Maybe a 25th anniversary addition convertible or something.

KM
06-21-2010, 06:33 AM
I know those northern winters and salt didn't help it much. I didn't know about the rust under the driver's seat at all. Only the rear driver quarter panel, I knew was pretty bad.

I think it would be good in a 6th gen personally. Maybe a 25th anniversary addition convertible or something.

I don't know a whole lot about 6th gens, that's my only issue.
Would I be able to drop it into a vert without welding?
'cause I'd love to do that.

And the issue with 25th anniversary, it's a 96 and I'd like to stay ODB1 if possible so I'm not throwing engine codes.

Edit: Nevermind. I just looked, and 6th gens are way out of my price range. Can't find one within 150 miles for less than a grand, even with blown engines.

90blacktrac
06-21-2010, 07:07 AM
Alright so I found the relay and the p/n on it is
85910-30050
06100-0352

and it looks like
http://www.celicatech.com/gallery/files/3/9/1/0/pic00049.jpg


If you think it will work for you I'll ship it out tomorrow.

KM
06-21-2010, 07:49 AM
Thanks, but I'm not sure it'll work, and I don't want to waste your time.

90blacktrac
06-21-2010, 08:12 AM
Eh it was worth a shot, really any relay should work if you change the plug and get a high enough amperage rated relay to replace it.

KM
06-21-2010, 10:00 AM
Yeah, I really appreciate you looking. I'll see if the local yard has one.

85gtsblackman
06-21-2010, 11:55 AM
theres a 6th gen coupe here on craigslist for 1000 obo, needed a radiator, rear brakes and a clutch master, want me to go check it out?

its a red coupe, i almost want to get it

http://jacksonville.craigslist.org/cto/1791031849.html

KM
06-21-2010, 09:43 PM
I can't afford a grand.
Hell, I'm going to have to sell some stuff to even do what I need.

I found a few 5th gens around here for under $500.