Ask Me Help Desk - 1993 toyota camry won't start

1993 toyota camry won't start

Just bought the car,and was told the fuel pump was out. Put a new one on, but there's no power getting to it(tested with elec.tester) it also has no spark. It's a 4cyl. Le. And we have bought a repair manual for it, I just thought maybe someone on here might have some insight into similar problems with this particular car.

. Ensure battery is fully charged.

. Clean battery terminals and cable connections.

. Test all under-dash and under-hood fuses with a test light or multimeter:

https://www.askmehelpdesk.com/cars-t...tml#post252145

. Check for codes.

. Replace coil, if there's still no spark.

. Replace the Ignition Control Module (ICM), should it continue not to spark:

http://www.partsamerica.com/productd...pe=194&PTSet=A

ICMs are problematic components on all older cars of this generation. I recommend replacing coils and ICMs on cars and trucks every 120,000 miles or 10 years, whichever comes first.

Kitch428 is our Toyota specialist. Hopefully, he will see your posting and comment.

When fuel pumps don't run, most of the time it's not a problem with the pump but with power getting to the pump; i.e. blown fuse, bad ground, bad relay, or failing ECM.

Since the fuel pump doesn't run, and there's no spark, I would begin by focusing on something very basic, such as one or more blown fuses, a bad ignition switch, poor main ground, or bad battery connections. Check the obvious, before buying new components.

There are two relays that power the fuel pump:
The starter relay has to have power, which provides power to the coil side (control side) of the Circuit Opening relay (the main control for the fuel pump)
The EFI Main relay is what provides the actual power to the switched side of the Circuit Opening relay.
You can power the fuel pump directly to verify that it works by providing battery power the FP terminal of the check connector under the hood. This should only be powered temporarily to determine if the fuel pump and related harness is OK.

This is NOT the way to power the fuel pump during normal operation.

When cranking, battery power first need to pass through the fuses and to the relay. Verify power to the relays. For safety reasons, when cranking, the Engine Control Module (ECM) will need to see ignition firing and oil pressure to engage the fuel pump. Otherwise, fuel could be pumped into an engine that is either not turning over (generating oil pressure) or it is not firing (unburrned fuel goes into the crankcase and/or out through the exhaust).

Determine why you have no spark first. Check the basics as txgreasemonkey has mentioned. Inspect the connections throughout the ignition system for proper contact and free from corrosion.

Quote:

Originally Posted by txgreasemonkey

When fuel pumps don't run, most of the time it's not a problem with the pump but with power getting to the pump; i.e., blown fuse, bad ground, bad relay, or failing ECM.

Since the fuel pump doesn't run, and there's no spark, I would begin by focusing on something very basic, such as one or more blown fuses, a bad ignition switch, poor main ground, or bad battery connections. Check the obvious, before buying new components.

Blown fuse, IN THE FUSE BOX UNDER THE HOOD there is a missing?? Fuse,relay,circuit breaker? I'm not sure but it is marked (ENGINE MAIN) has 5 prong slots and the empty space appears to be about an inch squared. I called the auto parts store they can't find anything listed under (ENGINE MAIN) and I can't find it in the repair manual. So can someone tell me what it is? It's purpose? And how I buy one?

. I would call your local Toyota parts department tomorrow. It's likely a 5-pin Engine Main Relay. Many Fords have 5-pin Fuel Pump Relays in the under-hood fuse/relay box. If there's another 5-pin relay in the fuse/relay box, you might substitute it and see if the car starts. This is commonly done. You may have identified the problem--it sounds big enough to be causing the type of problems you are experiencing. Again, it's likely something fundamental, since there's no spark and the fuel pump doesn't run.

. Look for a wiring diagram in the back of your repair manual--it may shed light on your situation.

. If the car was hit, the fuel pump inertia switch may need to be reset:

http://info.rockauto.com/SMP/SMPDetail3.html?FV7.html

If the intertia switch was tripped, it will cut off power to the fuel pump.

I got 1993 Toyota Camry LE and experienced also that problem. Try to replace the ignition coil which is located inside the distribution assembly. Unscrew the distribution cap and you will see it inside.It is not hard to do it just figure it out step by step.

Quote:

Originally Posted by bjader

I got 1993 Toyota Camry LE and experienced also that problem. Try to replace the ignition coil which is located inside the distribution assembly. Unscrew the distribution cap and you will see it inside.It is not hard to do it just figure it out step by step.

When replacing ignition coils I also recommend replacing the ignition condenser at the same time. You coil will perform better and last longer, too.

I have toy camry le 4 cyl it was running great yesterday, and this morning
Won't start all the fuces are OK ,any idea ?

Check for spark. Replacing the coil often solves the problem.