Author Topic: no spark (Read 3458 times)

tom85 · « **on:** May 23, 2011, 06:05:27 PM »

Ok so I had to replace the ignition switch and the truck sat there for awhile. It turns over im getting fuel all fuses andall wires are good. Im going to check if I get power from the coil tomorrow when I can get a helping hand. Does anyone have ideas on what could be wrong

79coyotefrg · « **Reply #1 on:** May 23, 2011, 07:04:23 PM »

checking to see if power is going to the coil would be the next move. but it sounds like you might have mice

tom85 · « **Reply #2 on:** May 24, 2011, 01:45:46 PM »

Turns out I do have spark so its either bad gas or to much gas. my dad things im getting to much gas

79coyotefrg · « **Reply #3 on:** May 24, 2011, 06:02:58 PM »

smelling fuel??

tom85 · « **Reply #4 on:** May 25, 2011, 08:12:16 AM »

Yea that's the weird part that's why we think its getting to much fuel. You know its going to be something easy

jimbo74 · « **Reply #5 on:** May 25, 2011, 08:53:33 AM »

try to start it with starting fluid.... if it runs, you know it's a fuel issue......

how long did it sit? are you gettign any fuel pressure at the motor?

tom85 · « **Reply #6 on:** May 25, 2011, 11:40:05 AM »

It ran before winter then it just sat there till now. We pulled a spark plug out to see if we had spark. We did have spark and fuel shot out the hole. I pulled the spark plugs out try to air out the cylinders

79coyotefrg · « **Reply #7 on:** May 25, 2011, 01:55:02 PM »

just below the thermostat housing to the side is a round thing that takes a 22mm wrench, I think thats the pressure regulator, and on the rear of the fuel rail will be another similar thing that controls the flow back to the tank.
check all that stuff to be sure its connected and clean

jimbo74 · « **Reply #8 on:** May 25, 2011, 02:29:45 PM »

fuel injected or carb?

tom85 · « **Reply #9 on:** May 25, 2011, 02:37:22 PM »

Its efi. Ill check those things. Also I tried spraying starting fluid and nothing. Could the spark be week to spark it

Norcal crawler · « **Reply #10 on:** May 25, 2011, 05:09:32 PM »

Yea, just because it sparks in the open doesnt mean it'll spark in the cylinder when there is compression. It takes more energy to spark under compression because more air is between the plug contacts. You could ohm out the coil and see if it is shorted or something.

tom85 · « **Reply #11 on:** May 25, 2011, 05:42:13 PM »

I have checked the ohms and they seem good im going to replace the plugs and maybe the coil tomorrow im running out of ideas

79coyotefrg · « **Reply #12 on:** May 25, 2011, 06:33:32 PM »

just for kicks have a friend hold the coil wire a 1/2 inch away from something metal and hit the starter. a good coil will jump the distance easy

tom85 · « **Reply #13 on:** May 25, 2011, 06:37:31 PM »

Yea I did that yesterday I held it as my dad turned the key im hoping its just the plugs

brainlessfool · « **Reply #14 on:** May 25, 2011, 06:47:33 PM »

if it jums a gap like that it got good spark. try new plugs. with the plug out crank the motor a bit.
that will cear out the fuel from the clys. then put the plugs back in and try again.

Cheesemaker · « **Reply #15 on:** May 25, 2011, 08:13:31 PM »

Just for giggles, I'm going to throw ideas out.

Fuel? Ethanol in fuel will draw moisture. Especially, sitting for a while.
Timing? If starting fluid didn't start it, I'm leaning on this one.
Checked for fuel PSI?
AFM/TPS checked?

tom85 · « **Reply #16 on:** May 28, 2011, 04:49:47 PM »

I don't want to jump to conclusions but it looks like I may jumped a few teeth. I turned the motor till the distributor lined up to number one and the crank marks were off. I pulled the valve cover off and looks lime the came is off. That's as fare as I got so ill let you know what I find

Cheesemaker · « **Reply #17 on:** May 29, 2011, 05:39:32 PM »

Look down along the timing chain and see what the chain tensioner looks like. It maybe worn out.

79coyotefrg · « **Reply #18 on:** May 30, 2011, 05:11:07 PM »

put the crank on 0* and take a pic of the cam

tom85 · « **Reply #19 on:** May 31, 2011, 06:12:05 AM »

Cams good cranks good. I was talking to a mechanic from toyota he said it sounds like the fuel regulator is bad. do I need the vsv hooked up to it because right now its not the vac line is ran right to the intake

79coyotefrg · « **Reply #20 on:** May 31, 2011, 10:07:54 AM »

I dont have my book handy but you need to see how its hooked up in the manual to get it to work properly I would think.

tom85 · « **Reply #21 on:** May 31, 2011, 11:32:40 AM »

It says that it should be hooked up but it ran with out it

tom85 · « **Reply #22 on:** Jun 02, 2011, 02:35:49 PM »

Ok so I trued checking for pressure but when I turned the key to on I got nothing but if I turned the key to start I got fuel but the line leaked so I couldn't get the pressure. Then I hooked every thing up and trued starting and it started for a couple seconds then wouldn't start again. So what do I do now?

tom85 · « **Reply #23 on:** Jun 03, 2011, 06:26:48 PM »

I should change the name of this thread to my truck has a mind of its own and the motor wont start. I pulled the egr valve off to get the fuel pressure regulator off but never put it back on. I was testing the volts at the harness for the fuel pump and with the key at on I had nine volts. I tried cranking it to see volts and the motor started ran for a while I noticed gas coming out of the motor where the egr valve bolts up. I hope people understand what I just said therewas a lot going on

yotaneck13 · « **Reply #24 on:** Jun 03, 2011, 09:40:27 PM »

did you compression test your cylinders? could be bad (really bad worst case) rings and you have no compression to fire if you have fuel in cylinders and spark should fire

tom85 · « **Reply #25 on:** Jun 04, 2011, 10:36:45 AM »

Compression is good. I was able to start it today with the gas peddle down and keeping it running around 2000 rpms. It wont idle though I tested the airflow meter and a couple of the oms test was high

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