91 camry crank no start - Toyota Nation Forum : Toyota Car and Truck Forums

bigblackcat · 01-03-2010, 06:32 PM

well heres another crank no start camry. I've read some posting on the cold start issue and thats what I seem to have. I've swapped out the cold start injector and cold start thermo sensor with ones from the junk yard; still no start. Engine does have fuel and spark. was wondering what are the values on the cold start sensor (i dont have a service manual) What else should I try or check????

Mike Gerber · 01-04-2010, 12:18 PM

Find out if your timing belt is intact. You can either look down the oil filler hole while someone cranks the engine to see if the cams are turning, or remove the distributor cap and have someone crank the engine while you observe the distributor rotor. If the rotor turns your belt is intact; if not you have found the problem.

Mike

bigblackcat · 01-04-2010, 12:24 PM

If i have spark at the plugs would that mean the the t-belt is in tact? when the engine is cranked over it sound like its got compression.

hzt30 · 01-05-2010, 02:43 PM

Quote:

Originally Posted by bigblackcat

If i have spark at the plugs would that mean the the t-belt is in tact? when the engine is cranked over it sound like its got compression.

If you are getting spark, then the T-belt is OK. Is the spark healthy when you checked it? How did you check for fuel? Take the distributor cap off and check to see if there is oil there. If there is oil, then the O ring for the distributor is leaking. Also this could be a bad coil or ignitor.

bigblackcat · 01-05-2010, 04:56 PM

I checked for spark by pulling out the using a spark checker; seems to be fine. Also pulled a plug wire out and installed a plug to it cnd visually check the spark (nice and hot). I did removed the distributor cap and inspected for moisture and oil; nothing found abnormal. If it where the coil or ignitor I would have spark, right?

Mike Gerber · 01-05-2010, 04:59 PM

"If i have spark at the plugs would that mean the the t-belt is in tact?"

Yes, you are correct. Sorry, I missed that in your original post. Is the spark a nice bright blue or is it orange? Bright blue is OK, orange is a weak spark.

Mike

bigblackcat · 01-05-2010, 05:07 PM

seems to be more orange/red than bright blue.

hzt30 · 01-06-2010, 02:11 PM

[QUOTE=If it where the coil or ignitor I would have spark, right?[/QUOTE]

You could have spark but it could be weak.

Does the engine crank smoothly or does it sound like it is out of time? Could be a slipped timing belt.

How did you check for fuel?? Did you check to see if the injectors were pulsing?

bigblackcat · 01-06-2010, 02:17 PM

engine cranks over like normal; makes a compression sound. as far as testing for fuel, all I did was undo the cold start injector fuel line to see the fuel coming out of it. I also tried spraying some starting fuel into the air plenum but it still did not fire off. I also swapped out the main efi relay with another one, and this did nothing.

hzt30 · 01-06-2010, 02:47 PM

Did it at least try to start when you used starting fluid? If you got fuel and spark the engine should start, unless the spark is out of time. Did you check to hear if the fuel pump was running by turning the key to the run position but not start. You need good fuel pressure for starting.

Did you check for any DTC's in the ECU?

Is this compression sound the normal sound you hear when the engine is cranked or does it seem to hesitate somewhat?

bigblackcat · 01-06-2010, 03:15 PM

when using the starter fluid, the engine made no attempt to start. Engine canks over normally. Have not checked for dtc; how is that done??? how much fuel pressure should I have and where should I check it at?

hzt30 · 01-06-2010, 04:09 PM

To check for DTC codes: in the engine compartment on the drivers side there is a diagnostic check connector. Use a paper clip and jumper TE1 to E1, the lid of the connector will have a chart of the positions. Then turn the ignition switch to the ON position and count the blinks of the check engine light. They will be two digit codes. The light will blink a certain number of times for the first digit and then there will be a slight pause and then blink again for the second digit...then there will be a longer pause.This will repeat until all the codes are read. If the light blinks steadily every second, then there are no codes stored.

Checking fuel pressure isn't that easy to do on these engines. You need to tap into the fuel rail with an adapter on a fuel pressure gauge. You can, at least, use a jumper at the diagnostic connector to check to see if the fuel pump runs by putting the cold start injector into a container and watch for fuel flow... but be careful doing this.

bigblackcat · 01-06-2010, 05:46 PM

I checked for codes today. The check engine light flashed twice, then again. Then a long pause before it did it again?

Mike Gerber · 01-06-2010, 05:57 PM

Quote:

Originally Posted by bigblackcat

seems to be more orange/red than bright blue.

That usually indicates a weak spark. I would check the specs on the coil with that in mind. You will need a digital volt/ohmeter and the specs from any manual. You can download a manaul for free at the top of the Camry forum over at AutomotiveForums.com. These are actual Toyota factory service manuals

Mike

hzt30 · 01-06-2010, 07:37 PM

Quote:

Originally Posted by bigblackcat

I checked for codes today. The check engine light flashed twice, then again. Then a long pause before it did it again?

Are you saying two flashes then another two flashes? That indicates code 22, a Open or short circuit in water temp. sensor signal. This should not cause a no start condition.

Have you checked timing to see if T - belt has not slipped a tooth?

Are the spark plugs wet with excessive fuel? This could indicate a fuel pressure regulator problem.

Are you sure you are getting a healthy spark? Is the spark checker you are using the adjustable kind where you can adjust the gap so the spark jumps 10,000, 30,000, 40,000 volts etc.?

Is this a 4 or 6 cylinder engine?