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Old 10-27-2019, 01:11 AM #1
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Cranks, has fuel, air, spark, no start.

Okay what am I missing?

Fuel pump failed. Would hard start and smacking fuel tank would get it running and ran great till shut off. Decided to upgrade to another DD and car sat for a year and now trying to get running.

What I've done.

Replaced fuel pump with walbro 190lph. Was already wired for 190lph as the pump that failed on me was a used denso 190lph I installed few years before.

Replaced battery.

Oil change, coolant change, air filter clean, all fluid top off.

Crank no start. No CELs.

Verified fuel is getting to rails. Can smell fuel at tail pipe and spark plugs wet from fuel.

Verified spark to all 6 plugs.

Checking timing belt and timing Mark's are dead on.

Cleaned maf.

Tested crank and cam angle sensors. Both have good resistance and create voltage.

Next I'm going to pull ecu and check for cam/crank voltage to ecu and look for any solder issues.

Am I missing anything? Damn thing ran great before sitting for a year.
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Old 10-27-2019, 02:11 AM #2
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I'm assuming you put new fuel in it so :

Have you checked compression? (I'm assuming this is fine though)
What's the resistance of the coil packs?
What's the fuel line pressure?

The ECU going bad would be unlikely since I think it would be a drive-ability issue but without looking more into that I have no idea on the ECU.
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Old 10-27-2019, 07:13 AM #3
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Quote:
Originally Posted by JayRolla View Post
Okay what am I missing?

Fuel pump failed. Would hard start and smacking fuel tank would get it running and ran great till shut off. Decided to upgrade to another DD and car sat for a year and now trying to get running.

What I've done.

Replaced fuel pump with walbro 190lph. Was already wired for 190lph as the pump that failed on me was a used denso 190lph I installed few years before.

Replaced battery.

Oil change, coolant change, air filter clean, all fluid top off.

Crank no start. No CELs.

Verified fuel is getting to rails. Can smell fuel at tail pipe and spark plugs wet from fuel.

Verified spark to all 6 plugs.

Checking timing belt and timing Mark's are dead on.

Cleaned maf.

Tested crank and cam angle sensors. Both have good resistance and create voltage.

Next I'm going to pull ecu and check for cam/crank voltage to ecu and look for any solder issues.

Am I missing anything? Damn thing ran great before sitting for a year.
Spark plugs wet from fuel? Nooooo....

Remove plugs. Crank it for a while. Install new plugs (Bosh double irridium work great). Remove fuel pump relay or otherwise disable fuel pump. Spray a little starting fluid into air cleaner.

If it fires, the problem is flooding. If not, check compression. The rings may have stuck in that year. Marvel mystery oil in the cylinders may fix that.
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Old 10-27-2019, 07:32 AM #4
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Is the crankshaft sensor reading rpm with a scan tool? Has to be 200 or 250 rpm for it to start. If cranking and 0 rpm most likely it.

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Old 10-27-2019, 07:34 AM #5
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I would verify that the fuel pressure is correct. You may have fuel at the rail but not enough. Also check the FPR to see if it is leaking/bad. Those diaphragms can fail when they get old and sit for some time when they are up in the years.

Maybe the 4Runner is getting a little revenge for you letting her sit for some time and was jealous of the Caddy...
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Old 10-27-2019, 08:04 AM #6
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I have to agree with Little Ceaser, revenge. After years of being the love of your life, wined and dined at the best gas stations, she sat in the corner while you were hot and heavy with someone else. You sir have a lot of groveling to do. I would start with the fuel. Definitely won't start with wet plugs. It would help if you did the work on your knees in a gravel driveway
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Old 10-27-2019, 10:30 AM #7
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Quote:
Originally Posted by brillo_76 View Post
Is the crankshaft sensor reading rpm with a scan tool? Has to be 200 or 250 rpm for it to start. If cranking and 0 rpm most likely it.

Sent from my SM-J337V using Tapatalk
Has spark though. So I would check fuel side first like others suggested. You cant ignore them. They will let get back at you. I mostly start them at least once a month :]

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Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
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Old 10-28-2019, 10:34 PM #8
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Quote:
Originally Posted by APhelps View Post
I'm assuming you put new fuel in it so :

Have you checked compression? (I'm assuming this is fine though)
What's the resistance of the coil packs?
What's the fuel line pressure?

The ECU going bad would be unlikely since I think it would be a drive-ability issue but without looking more into that I have no idea on the ECU.
I have not checked compression but compression/leak down tests will be a step I may have to do. I have not checked resistance at coil packs but all plugs get strong visible spark with new plugs and OEM wires. Fuel pressure has not been checked but I am getting a lot of fuel at the rails. Almost seems like too much for a cold start.

Quote:
Originally Posted by The Cold War Kid View Post
Spark plugs wet from fuel? Nooooo....

Remove plugs. Crank it for a while. Install new plugs (Bosh double irridium work great). Remove fuel pump relay or otherwise disable fuel pump. Spray a little starting fluid into air cleaner.

If it fires, the problem is flooding. If not, check compression. The rings may have stuck in that year. Marvel mystery oil in the cylinders may fix that.
I almost feel like I am getting too much fuel. Maybe FPR has failed from sitting. I may have fixed the issue and now its flooding not letting it start. Next attempt I am going to get new plugs and try the starting fluid.

Quote:
Originally Posted by brillo_76 View Post
Is the crankshaft sensor reading rpm with a scan tool? Has to be 200 or 250 rpm for it to start. If cranking and 0 rpm most likely it.

Sent from my SM-J337V using Tapatalk
I have seen 50-200 rpms maybe more with my odb2 reader. I have also bench tested both cam and crank sensors to make sure they are creating voltage, have good resistance, have standing power and good ground. I have not checked readings at the ecu though.

Quote:
Originally Posted by LittleCaesar View Post
I would verify that the fuel pressure is correct. You may have fuel at the rail but not enough. Also check the FPR to see if it is leaking/bad. Those diaphragms can fail when they get old and sit for some time when they are up in the years.

Maybe the 4Runner is getting a little revenge for you letting her sit for some time and was jealous of the Caddy...
Oh I know its revenge for cheating on her so long. I have a lot of fuel at the rails. Almost seems like too much. Maybe the FPR has failed and is flooding the motor.

Quote:
Originally Posted by St Runner View Post
I have to agree with Little Ceaser, revenge. After years of being the love of your life, wined and dined at the best gas stations, she sat in the corner while you were hot and heavy with someone else. You sir have a lot of groveling to do. I would start with the fuel. Definitely won't start with wet plugs. It would help if you did the work on your knees in a gravel driveway
She is on the side of the house and I was working in the dirt that was water soaked from recent snow. Not fun. She is paying me back for sure. HAHA.

Quote:
Originally Posted by brillo_76 View Post
Has spark though. So I would check fuel side first like others suggested. You cant ignore them. They will let get back at you. I mostly start them at least once a month :]

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From what I can tell she has LOTS of fuel. Strong spark. Working crank and cam sensors. Timing is dead on. I am thinking now its flooded now and just needs plugs and fresh try after I fixed something. Or the FPR has failed and is flooding the motor.
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Old 10-28-2019, 10:40 PM #9
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All your grounds are good? Sorry if you covered that already.
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Old 10-28-2019, 10:51 PM #10
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All your grounds are good? Sorry if you covered that already.
Now that you mention it the ground between the passenger side valve cover to firewall is broke. Has been broken and ran fine before all this. Grounds from battery all seem good but I will check them now that you mention it.
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Old 10-28-2019, 11:07 PM #11
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when ignition on is their voltage at the injectors? all vacuum lines hooked up fuses good. also check the wires at the ignitor. spray some starter fluid and see if it fires up.
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Old 10-28-2019, 11:13 PM #12
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when ignition on is their voltage at the injectors? all vacuum lines hooked up fuses good. also check the wires at the ignitor. spray some starter fluid and see if it fires up.
All injectors are firing fuel. Fixed all vacuum lines. Have sprayed starter fluid but plugs are wet from fuel since no start.
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Old 10-28-2019, 11:18 PM #13
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could be a dumb idea but, make sure your air filter isn't clogged up. could cause it to run way too rich like you describe.
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Old 10-28-2019, 11:30 PM #14
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could be a dumb idea but, make sure your air filter isn't clogged up. could cause it to run way too rich like you describe.
I'm running no air filter at the moment.
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Old 10-29-2019, 04:57 PM #15
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Hmmm no filter huh? I've never tried starting the 3.4 w/o an air filter.

I know a polaris engine (carb) is entirely different yet they won't start w/out an air filter in place. Just a thought....
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