Hi guys,
I am new to the site, but it looks like you have a pretty cool community here. I am having a problem with a friend's yota, and need help!
So here is the deal. A friend of mine just got a 1991 Toyota Corolla from his pop in-law. His A/C was not working correctly, so he started pulling fuses to see if one was blown. He didn't find a bad fuse. Now though, the car will not start. I went over there with test light in hand to try and help. I found that the A/C had a wire unplugged, so that problem is fixed. I had power at the Coil, but no spark at the plug. The coil is integrated with the dist. He went and bought a whole new Distributor it came with a new rotor, coil, crank sensor and igniter. It didn't fix the problem. I still have power at the dizzy, but no spark. Along with this, he said that the fans used to kick on when the key was in the on position, but since this whole incident, they dont work either. I found a dead 30 Amp fuse under the hood that said "fan" there was no power at all to the fuse (the fuse still looks good) even with the key on. I decided to run a pigtail from the hot on the battery to the fuse. The fan kicked on, but about 10 seconds later I fried a wire. It is a white wire with a black line. It comes into the underhood fuse block but I traced that wire to a ground. Why did it fry? Does anyone have any suggestions as to the problem? can the lack of power to the fan, and the issue with the car not starting have a common problem?
I am really scratching my head over this. any help would be great!
A few more things. The timing belt was just replaced 3 weeks ago. I did it myself, so I double checked to be sure I didnt do something wrong. The Rotor still spins, so I know that it's not broken. I am certain we have fuel, I could smell it when trying to start the care. The engine is a 4FE? It's a fuel injected 4 CYL...
Last edited by jsa90; 08-13-2009 at 04:41 PM.
Reason: Added details
do u have a small lil fuse box like connected to ur positive terminal? check those if u do and make sure all the fuse is the right size and check the fpr ,make sur u have oil in the car but beside that i dont know bro u got some crazzee shit goin there
so you have power at the dizy but nothin coming out of the cap?? maybe you just have a bad connection between distributor and the components. or maybe there is a short involving the a/c that affects the spark and thats why it was unplugged. sounds like there is some voltage irregularities if you are frying wires. test the battery and make sure the voltage isnt of the charts. the fan should not just turn on when the key is engaged, it should only turn on when the engine reaches above running temp.(unless you mean vent fans?) there are definitely some wiring problems (wires crossed or hooked up wrong)on this car if Im understanding your problem. if you supplied power to the ground it may fry and could have caused additional damage to all connected components and wires. I dont really understand why you ran power to the fan fuse with the car not running though, there is a temp sensor that allows voltage to reach the fan when it should. if you could clarify you may get more help. and edit your first post to say 1991 instead of 2001, alot of people will se that and leave the thread without even reading.
sounds like either a fuse issue or an ECU issue... I would imagine the fans aren't turning on because the ECU isn't flipping the relay. and it isn't tell the coil to fire...
have you checked all the fuse boxes? there is on near the driver's feet (to the left of them) one in the engine bay and then the one on the batter terminal.
__________________
'01 Impreza 2.5 RS - Mud flaps, skid plates, Gravel Dampers
'89 RX-7 TurboII - Megasquirt-3 - 270 rwhp
'89 Corolla SR5 - 4AGE ST 20V 6spd LSD, Megasquirt II, Koni Race Dampers + GroundControls + camber plates F/R, GT-S Rear brakes
'81 BMW R65 For Sale: GT-S strut bar + Front GT-S koni yellows
ok, so to clarify...
The fans were hardwired by the po to run when the key is in the on position. The new owner removed a bunch of fuses, checked them and reinstalled, but now the fans do not come on, and the car will not start. There is power to the coil, but I cant get spark to the plugs. I removed the coil, and I have power out of the coil and it seems there is power to all other components in the dizzy. I have checked the fuses in the cab of the car and all look good. I noticed that there is no power to the "fan" fuse, which is located under the hood in the large fuse block. I feel this is a wiring problem, and I don't think that it's coincidence that the fans are now non-op and the car wont fire. I hard wired the "fan" section just to see if I could get the fans to start by bypassing the fuse. I was hoping to have time to try to start the car, but the wires started smoking before I could test.
sounds like either a fuse issue or an ECU issue... I would imagine the fans aren't turning on because the ECU isn't flipping the relay. and it isn't tell the coil to fire...
have you checked all the fuse boxes? there is on near the driver's feet (to the left of them) one in the engine bay and then the one on the batter terminal.
This is what I thought too. Is the ECU located in the Dizzy?
since you say the car was running fine before your friend started messing around in the fuse box i think you should concentrate more on that area before spending a few hundred bux on a new ecu. maybe he got curious and also pulled some relays? who knows what he did under there. also you should figure out exactly what burned when you tried to jerry rig the cooling fan.
The radiator fan will run continuously with the ignition on, if:
(1) the fan switch is bad
(2) the wire to the fan switch is broken
(3) the A/C high/low pressure switch wire is loose
It is "fail safe on". Other than that, it should only come on when the engine is hot, or the A/C is turned on.
The condensor fan might come on also with the above listed failures.
The rest I have to do a little pondering about.
__________________
'88 Corolla, AE92 SR-5, 7A-FE swap/GT-S suspension
'87 Corolla, AE82 FX-16, 4A-GZE swap (autocrosser)
'03 Tundra 4X4 Access Cab, (FX tow vehicle/Home Depot runner)
Modification: Changing something to what you thought it should have been from the start!
The radiator fan will run continuously with the ignition on, if:
(1) the fan switch is bad
(2) the wire to the fan switch is broken
(3) the A/C high/low pressure switch wire is loose
It is "fail safe on". Other than that, it should only come on when the engine is hot, or the A/C is turned on.
The condensor fan might come on also with the above listed failures.
The rest I have to do a little pondering about.
or the circuit is fried in the ECU... I fried mine on my megasquirt by accident and no my fan is on all the time :-P I need to fix that...
__________________
'01 Impreza 2.5 RS - Mud flaps, skid plates, Gravel Dampers
'89 RX-7 TurboII - Megasquirt-3 - 270 rwhp
'89 Corolla SR5 - 4AGE ST 20V 6spd LSD, Megasquirt II, Koni Race Dampers + GroundControls + camber plates F/R, GT-S Rear brakes
'81 BMW R65 For Sale: GT-S strut bar + Front GT-S koni yellows
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I had power at the Coil, but no spark at the plug. The coil is integrated with the dist. He went and bought a whole new Distributor it came with a new rotor, coil, crank sensor and igniter. It didn't fix the problem. I still have power at the dizzy, but no spark. Along with this, he said that the fans used to kick on when the key was in the on position, but since this whole incident, they dont work either. I found a dead 30 Amp fuse under the hood that said "fan" there was no power at all to the fuse (the fuse still looks good) even with the key on. I decided to run a pigtail from the hot on the battery to the fuse. The fan kicked on, but about 10 seconds later I fried a wire. It is a white wire with a black line. It comes into the underhood fuse block but I traced that wire to a ground. Why did it fry? Does anyone have any suggestions as to the problem? can the lack of power to the fan, and the issue with the car not starting have a common problem? 
. any help would be great!
88 sr5 100k Stock.
Linear Mode
