
This is a quick recap of what restored my 1994 Toyota Corolla back to its reliable self. This is a share of an experience, not advice or a diagnosis- always do your research and decide for yourself whether you can do this repair or need to seek help from an automotive professional. Maybe this post will help you out of a jam if you are experiencing the same symptoms. Hopefully this won’t be too wordy for you, if so skip to the end to see what the fix was. I’ve included some pictures so you can compare your engine to mine.
So Good Before The Problem
I’ve had a great experience commuting to work in this ultra-reliable car. It starts right up no matter what the outside temperature is, and is as fun to drive as a five-speed go kart. With over 200,000 miles, it still gets around 34 miles to the gallon. It’s not the most comfortable ride and there are plenty of quirky things in its 25th year of service long after it rolled off of the assembly line, but I was convinced that I could drive this car anywhere and forever.
Then Came The Problem
There I was, in bumper-to-bumper traffic, two miles from the nearest exit, and the car just stopped running. In the milliseconds while the RPMs dropped to zero, I had perceived that it had shut down like the key was switched off rather than starved for fuel or something similar. I turned the key to quickly restart the car, but with no luck…after a few more attempts of longer-than-usual cranking it started again. I moved with the traffic a few feet, then the car shut off again. And again… Luck being on my side, I was able to restart the car repeatedly the whole way to the exit ramp. It took what seemed like two dozen more restarts then the car seemed to snap out of it and stayed running without a hitch for the last 20 miles home.
7A-FE Engine
My ‘Rolla has the 7A-FE 4-cylinder engine. There’s a lot of information on the internet about this engine, including what manufacturers used it and in which years and models. I learned a lot about this engine from surfing dozens of posts, including that this workhorse engine had multiple revisions of electrical controls. WHICH VERSION DID I HAVE??? I couldn’t be sure. Information overload set in.

Early Attempts to Repair
Rather than going into boring details of the things I tried that didn’t fix the problem, I’ll just say that fuel pressure was good and the ignition relay, fuel cutout relay, and fuel pump were not the problem. I could drive it reliably for shorter distances. I almost made it all the way to work but it shut off a mile from the freeway entrance. I was able to make it home after one restart. Tow-truck avoided again.
Time for a New Used Car – Almost
Up to this point, I had invested a lot of time and concluded that I was chasing a fluke problem that I might never find. Even though I really liked the car and appreciated how little it cost me to operate and maintain, I decided that I was not going to invest any more time chasing a ghost problem, rebuilding the electrical system piece by piece without schematics that I knew were exactly for this car and engine combination. Enough was enough, it was time to look for another car. I went to several used car lots, and took a test drive of a neighbors car for sale. It seemed like I’d end up with a ‘new’ used car and be exposed to all of the unknown problems that would only show over time.
One Last Attempt – Throw a Little More Money at the Problem
Being both stubborn and optimistic – and because ‘I wake up stoked most of the time’ like it says on my home page – I decided one morning that one last repair attempt was in order. I had suspected that maybe something in the distributor or an external crank or cam sensor was the problem. I learned that Ebay has tons of complete NEW distributors listed for around 50 dollars, US. I also found a new crankshaft sensor listed on one of the online superstore sites for less than 20 dollars. I ordered both parts even though I was not sure which part might be the fix.


Side view. 
Close-up. 
Close-up of the connectors showing the 6-pin variety of the closest one in the pic.
7A-FE Crank Sensor – Not on This One
While waiting for delivery of the parts, I received an email alert that the crank sensor was out of stock. No replacements were available at a price I was willing to pay right then, so I cancelled the order and accepted that I’d just try to put in a distributor first and see if that part alone would be the answer to the stalling problem. As happens a lot on web searches for car repair posts, some people said that there was not a separate crank sensor on the 7A-FE engine but most said there was one. Even though I ordered a crank sensor before confirming my engine had one, now that it was no longer on the way, for closure I looked all over the engine and confirmed for myself that this particular Corolla did not have a crank sensor. It worked out that the sensor that I ordered was out of stock.
What Was Apparently Happening
The best I can tell, one of the rotation sensors in the distributor was on the verge of failing, but not quite there. After about 45 minutes of driving, the heat from the engine would soak into the distributor and the sensor would heat up and stop functioning, likely because of increasing resistance.
Summary – So What Exactly Was the Point of This Blog Again ??!!
A failing electrical component in the distributor was the reason that the car stalled after warming up to operating temperature. For 50 dollars I received a new, complete distributor: housing, igniter, cap, rotor, coil and two sensors. It was incredibly cheaper than buying individual rebuild parts. It was also much easier, because just two bolts hold the distributor assembly in on the side of the engine.
There are several configurations of the distributor – some with 6 pins in the connector and some with 4. Count your pins before you order and confirm that the replacement not only matches by the year/model fitment description but also matches the connector configuration.
Some 7A-FE engines have a crank sensor near the vibration damper or in other location nearby. Some engine versions don’t have a crank sensor. Mine does not. I hope this report helps somebody, good luck with your own diagnosis and repair!









