HELP! I need your guy's help. My 93 1.6L won't start when hot, or after shut off.... - Toyota Nation Forum : Toyota Car and Truck Forums
Corolla 7th Generation (1993-1997) Specific discussion of the 7th generation

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post #1 of 137 Old 04-11-2019, 04:02 PM Thread Starter
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Exclamation HELP! I need your guy's help. My 93 1.6L won't start when hot, or after shut off....

Got my account settings straightened out, "My password had expired." Here is the new thread...

Quote:
Originally Posted by 94RollaDad View Post
This happened before or after the brand new distributor?

Aftermarket distributors are known disasters even new right out of the box. See: https://www.toyotanation.com/forum/1...lt-issues.html
After.

I'm working on getting the quickie mechanic to put the old one back on, since that likely wasn't the problem.

Just ordered 4 new injectors, too....

HERE IS THE ORIGINAL POST:

I NEED YOUR HELP!!! My 93 1.6 won't start when hot...

Hi y'all! It has been a while, but now I need your help, and this site is better than the snooty Oil site, sadly. My 93 1.6 I wasn't there when it happened, but, short version.. it basically (from what I was told

- Stalled on the road
- Wouldnt start back up
- Had to be towed

Then:
- Started next day
- Ran poorly
- Had distributor changed .

From what I saw, and could recreate:

- Car started right up. Seemed to idle fine. Fluids look good.
- Idled for a nice long time. I pressed the gas to rev it, and it died...
- Wouldnt start back up.
- About an hour later it did.
- Tried the gas again.. died.
- Then it wouldn't start back up, no matter what.
- Tried starting fluid, didn't seem to make a difference at the end... not sure if I sprayed it in right. I know you need a lot.

Fuel injectors? Fuel? Jumped a tooth on time?? What's up? This is the first time the car has done anything like this.

Got a brandy new distributor on it.. what would you next do?
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post #2 of 137 Old 04-11-2019, 06:24 PM
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I'm confused. So if it happened after you replaced the distributor, what was the rationale for swapping the distributor? I.e. what were you trying to fix before this happened that caused you to then replace the distributor?

The symptoms you are describing are very typical for a bad distributor.

I doubt you'll see any change with new injectors. Make sure you don't just throw parts at the problem.
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post #3 of 137 Old 04-11-2019, 06:41 PM Thread Starter
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Quote:
Originally Posted by 94RollaDad View Post
I'm confused. So if it happened after you replaced the distributor, what was the rationale for swapping the distributor? I.e. what were you trying to fix before this happened that caused you to then replace the distributor?

The symptoms you are describing are very typical for a bad distributor.

I doubt you'll see any change with new injectors. Make sure you don't just throw parts at the problem.
The reason I thought "Injectors" is this:



The car had fuel pressure, etc. Fuel injectors (failing due to high resistance when hot) is why it would always crankcrankcrank when hot, but not start.

My mechanic friends suggested it could be:

1. Vacuum leak in air intake tube
2. MAF sensor (that I believe the Toyota doesn't have)
3. Timing chain or belt jumped a tooth or two

I thought it could be:
1. Bad fuel/water-in-the-gas sabotage (at the funeral)
2. Fuel delivery .

?

Oh.. you asked "Why was the distributor changed" - Get this, it was changed because the car decided to die and need a tow on the way home from my Girlfriend's Mom's funeral. Never gave me any major issues, sure it needed new exhaust manifold and AC recharged, but it always, always ran... The mechanic jipped her. Charged $500 price, that to install new distributor. There sure is a new distributor on there, but I imagine the old one is just fine....... Now, he feels bad and wants to help solve the problem.

I wonder if I can tap on the fuel injectors with a screwdriver, and put Heet and cleaner in the gas.... large amount.. ?
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post #4 of 137 Old 04-12-2019, 01:56 AM
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Quote:
Originally Posted by GHT View Post
The car had fuel pressure, etc. Fuel injectors (failing due to high resistance when hot) is why it would always crankcrankcrank when hot, but not start.
Why don't you measure the injector resistance when cold and when hot (when it won't run)? Resistance should be 13.4-14.2 Ohms at 68F. The injectors shouldn't get too hot like other parts of the engine since they have gas running through them.

Quote:
Originally Posted by GHT View Post
My mechanic friends suggested it could be:

1. Vacuum leak in air intake tube
2. MAF sensor (that I believe the Toyota doesn't have)
3. Timing chain or belt jumped a tooth or two

I thought it could be:
1. Bad fuel/water-in-the-gas sabotage (at the funeral)
2. Fuel delivery
These engines have a Manifold Absolute Pressure (MAP) sensor. Basically a vacuum sensor. This setup is less susceptible to problems when there is a vacuum leak, but a small vacuum leak would cause a higher idle, not necessarily cause it to stall.

If the timing belt jumped it would run like crap all the time...if it ran at all.

I hope the mechanic knew how to set the base timing correctly using a timing light and jumping the Te1 & E1 terminals in the check connector under the hood.

1990 Corolla DX sedan, 4A-FE, 3-speed auto A131L
233,000 miles and counting...

1997 Corolla DX sedan, 7A-FE, 4-speed auto A245E
213,000+ miles
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post #5 of 137 Old 04-12-2019, 01:58 AM
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Quote:
Originally Posted by GHT View Post
The car had fuel pressure, etc. Fuel injectors (failing due to high resistance when hot) is why it would always crankcrankcrank when hot, but not start.

My mechanic friends suggested it could be:

1. Vacuum leak in air intake tube
2. MAF sensor (that I believe the Toyota doesn't have)
3. Timing chain or belt jumped a tooth or two

I thought it could be:
1. Bad fuel/water-in-the-gas sabotage (at the funeral)
2. Fuel delivery .
If you really want to check your theory on the fuel injectors, grab a multimeter, check the resistances on each injector when it's cold, start and run the car till it stalls and won't start, and recheck each injector. I highly doubt that the injectors are the issue though. The intake manifold doesn't get hot enough to cause issues and injectors never fail all at once unless there was user error when fiddling with the electrical system.

I'm willing to bet that the distributor has failed. The ECU will not fire the injectors if it can't get a crank signal from the distributor.

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Corollas don't like it when you hurl them backwards towards a tree.
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post #6 of 137 Old 04-12-2019, 04:41 AM
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Most likely bad ignition-coil or ignitor inside distributor. Clue is it dies when load increases. Another clue is when hot.

Please read this sticky and all threads linked within.
List of confirmed distributor-at-fault issues
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post #7 of 137 Old 04-12-2019, 07:43 AM Thread Starter
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^ Thanks, all, so much.

It sure would be the easiest scenario if that brand new distributor was put on is no good. Seems like there is a decent chance of that. (I also thought you didn't touch the timing if you are simply taking off, and putting back on, a new distributor, in the same orientation and all as the new one. Unless you suggest spark plug wires put on in incorrect spots at the distributor.)

Let's see if I am brave enough to do this today. I have a car service call.. On two cars, actually.


Would be the best case if this ends up in a "list of confirmed distributor issues" thread. Let's find out...
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post #8 of 137 Old 04-12-2019, 03:11 PM
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Yes, you can swap distributors without changing ignition-timing too much. But you have to mark original rotation very accurately before removing.
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post #9 of 137 Old 04-12-2019, 03:57 PM Thread Starter
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No spark.

?
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post #10 of 137 Old 04-12-2019, 03:59 PM Thread Starter
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(On a lark, after not starting on starting fluid, I pulled the wire for Cylinder #4 the one right next to the distributor and there was no spark into the screwdriver right up in the thing with like 1/16" gap.) The gas and its delivery seems fine. Weird that I don't hear the fuel pump buzz, but gas comes, so... (it floods out after 5 or so tries of starting with no spark...)

Should I order another distributor, or get an "ignition module?" Might just change it right there in the parking lot and fix this thing.
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post #11 of 137 Old 04-12-2019, 04:17 PM
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Could be many causes of no spark. Don’t replace perfectly working parts with brand-new working parts because nothing will change. Confirm 100% that something is bad before replacing.

1. Key ON, test for +12v going to distributor, to ignitor, to ignition coil
2. Measure impedance of G and NE distributor sensors, at sensors’ plug AND at ECU connector
3. Verify G and Ne sensors’ waveforms match FSM
4. Distributor rotor and cap
5. Spark plug wires, what is resistance of each one?
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post #12 of 137 Old 04-13-2019, 07:34 AM Thread Starter
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It's not the fuel injectors.

Amazon Amazon

^ Tempted to get at least one more of those....

Will post back, going out there today/soon, have to finish Saturday morning breakfast before I rush off...
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post #13 of 137 Old 04-14-2019, 03:14 AM
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I have same problem on my 93 corolla the only thing i change is the temperature sensor it fix the problem..sensor is bad, ECU think is overheating thats why it wont start when is hot. easy fix good luck
t
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post #14 of 137 Old 04-18-2019, 09:44 AM Thread Starter
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Hi, everyone. I did not abandon this thread.

Tomorrow morning is showtime.

I have confirmed there is NO SPARK the other day, no spark jumping to the screwdriver from Wire #1... I see the following two videos, about how you can see spark, where is, should jump an inch, etc: (He has a 7AFE but same thing, the fix comes in Video 2, I suspect I flooded out the engine too)



** Temperature Sensor fail? Noted. I will change the distributor, plugs and wires (because "why not") OR change the distributor first and see what that does.. Maybe see spark jumping from a point on the distributor to my screwdriver and then fire it up...)

I have to charge my battery up a bit, it's a little low (especially now) and I see how he changed just the coil.. but, these parts are all in the distributor!

Last edited by GHT; 04-18-2019 at 09:47 AM.
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post #15 of 137 Old 04-18-2019, 09:50 AM Thread Starter
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What is the location of the Temperature Sensor?
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