fuel issue on 86 toyota pickup help plzz????
01-25-2010 | 04:12 PM
#61
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From: Texas
if the tubingthat connects from the maf sensor unit to the intake pops off when trying to start what does that mean? never seen that before didn't start doing that till i replaced everything like the fuel pump and stuff like that...anyone know?????? plzzzzz help meeeee.....ty
Maybe the dizzy bolt backed out enough to alter the timing??
01-26-2010 | 12:06 PM
#64
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From: illinois
well found out a way to test the fuel pressure regulator--if theres fuel in the vacuum line it is bad it it is dry it is good.mines fine.
waiting for my new injectors, and tried starting my truck today i cleaned the maf sensor and tried adjusting the distributor to get it to start but it still sounds like its only one cylinder firing. someone i spoke with said there is a screen in the fuel rail aswell that can be cloged dirty, so i'll check that too when i change to the new injectors
waiting for my new injectors, and tried starting my truck today i cleaned the maf sensor and tried adjusting the distributor to get it to start but it still sounds like its only one cylinder firing. someone i spoke with said there is a screen in the fuel rail aswell that can be cloged dirty, so i'll check that too when i change to the new injectors
01-27-2010 | 06:10 PM
#68
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From: illinois
well replaced the injectors found allot of fuel in the bottom intake bracket with allot of blackness i'm guessing carbon buildup. the fuel pressure regulator wasn't tigh was actually loose the bolt not even tighte3ned now it is put new gaskets on there checked rotor cap looks fine turned the main harmonic balancer it was off 2 turn to the rightput it back at top dead center to (0). TRIED STARTING IT NO LUCK!!! gonna try and swith the fuel return and the vapor back by the gas tank just to see if that is what it is....o and tried spraying in carb cleaner and it almost started better than before...so idk.. well trying that idea, let me know what you all think i should do now? o also tried adjusting the distributor so its not so retard but more power. nothing... anyhow....peace.
01-28-2010 | 08:02 AM
#70
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From: Corpus Christi, TX
Check that the main ground cable from the battery is mounted to the block. Check that the Valve cover is mounted to the frame (in the back) and check that ground cable to the intake. I think you need a noid lamp to see if you have injector pulse. Do the sparkplug have gas smell on them?
01-29-2010 | 11:49 AM
#71
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From: illinois
i think i screwed it up, i tried adjusting the timing made both the head and the harmonic balancer at 12 oclock position like the manual said and now it doesnt feel like it wants to start at all. now makes a sound thats wierd like its a motor in the starter not working at all to turn it over i think i screwed up any suggestions????
01-29-2010 | 12:47 PM
#73
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Don't take this the wrong way mate, but 3 pages in and the problems are still developing - I think it might be time to drop it into your mechanic. If it started before you messed with timing and now it doesn't...guess what it is?
01-29-2010 | 03:33 PM
#74
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From: illinois
well i checked the timing but it was off when i got into it so i adjusted it ---and (milehigheric) if ya read the three pages you would have noticed it hasnt been running this whole time.
01-29-2010 | 05:14 PM
#75
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From: hubert nc
well, was the timing the problem from the start! probelly not.. more like a fuel delivery problem... when you put you hands on projects kiss it simple and stay with the basic's
air, fuel, spark, and compression and you should have a running engine..
did you crack the banjo bolt to the fuel rail to see if you are getting a good fuel pressure to the fuel rail
did you pull the plug wire off the #1 cly. and ground a the plug against the block to see if you are getting spark while having some crank the starter.
if you not sure the truck is getting fuel. check out all your fuses, relays to make sure they are working..
if you take one probelm at a time, you should be well off.. dont get in there and start mokeying around or you well just find yourself in a barrel of monkeys...
air, fuel, spark, and compression and you should have a running engine..
did you crack the banjo bolt to the fuel rail to see if you are getting a good fuel pressure to the fuel rail
did you pull the plug wire off the #1 cly. and ground a the plug against the block to see if you are getting spark while having some crank the starter.
if you not sure the truck is getting fuel. check out all your fuses, relays to make sure they are working..
if you take one probelm at a time, you should be well off.. dont get in there and start mokeying around or you well just find yourself in a barrel of monkeys...
01-29-2010 | 10:44 PM
#77
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So just to keep everyone updated that couldn't be bothered reading through (now 4) pages of circles here is were we are at.
-This issue occurred seemingly out of the blue with slight prior warning of throttle hesitation, hard starts and eventually dying away from home.
-Spark plugs were checked and looked OK although no spark FIRE was confirmed?
-Fuel lines/filters were replaced and fuel pressure IS at the intake.
-Injectors have been cleaned/replaced
-Timing was fiddled with, im not sure what exactly?
We dont have a confirmed spark, we dont have confirmed compression, and we don't have confirmed air supply, but at least we have knocked off fuel supply in 3 pages of dribble. These are the basics, and if we havn't got the Aok on all of these then we can't start offering advice with anything more than random guesses.
Timing should never abruptly slip out of position, especially in EFI vehicles when the ECM has some flexibility to keep timing near its mark. It is possible the timing chain has jumped a gear but again I am just randomly guessing. And how the hell do you make the head 12 o clock?
As I said, don't take this the wrong way...but a mechanic should knock this over in minutes - even if you dont want him to do the work get a diagnosis and get this fixed haha.
01-30-2010 | 09:41 AM
#78
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From: hubert nc
Mile... This is a good summary and probably a good option.
I read this whole thing and I'm quit amazed.
Mordoc... wow... I feel for ya.... I suggest you get a Factory Service Manual, if you plan to work on this vehicle, if you don't already have one.
You need to go back to square one.
1) get crank pulley to TDC, with number one cylinder firing (both rockers will be loose. Make sure timing chain guides are in tact. Make sure the dot on the cam sprocket is at 11:30ish. The cam keyway should be at 12:00 o'clock.
2) Make sure the rotor is at the number one firing position on the cap. Adjust the distributor so the hold down bolt is in the middle of the slot.
3) Check the valve lash for all 8 rockers.
4) Make sure all 4 spark plugs are clean and tight, and check that the plug wire are in the proper firing order.
5) The air tube from the MAF (air flow sensor) over to the throttle body must be tight (check the clamps).
6) Check that all vacuum lines are connected and correct. There is vacuum line that attached to the bottome of ERG modulator -- make sure it's attached.
7) Test, and adjust the TPS
8) Check the fuel pressure damper for leaks, usually you can smell the gas or see it dripping fuel.
9) Make sure you've got a fully charged battery, and the clamps and posts are cleaned. Check the ground strap to the block.
10) Before you try to start it, turn the ig key on count to 10, turn it off, and do it again 5 times, then try to start it.
Are you sure you've got clean, fresh and healthy gas?
Let us know where you're at.
gNARLS.
I read this whole thing and I'm quit amazed.
Mordoc... wow... I feel for ya.... I suggest you get a Factory Service Manual, if you plan to work on this vehicle, if you don't already have one.
You need to go back to square one.
1) get crank pulley to TDC, with number one cylinder firing (both rockers will be loose. Make sure timing chain guides are in tact. Make sure the dot on the cam sprocket is at 11:30ish. The cam keyway should be at 12:00 o'clock.
2) Make sure the rotor is at the number one firing position on the cap. Adjust the distributor so the hold down bolt is in the middle of the slot.
3) Check the valve lash for all 8 rockers.
4) Make sure all 4 spark plugs are clean and tight, and check that the plug wire are in the proper firing order.
5) The air tube from the MAF (air flow sensor) over to the throttle body must be tight (check the clamps).
6) Check that all vacuum lines are connected and correct. There is vacuum line that attached to the bottome of ERG modulator -- make sure it's attached.
7) Test, and adjust the TPS
8) Check the fuel pressure damper for leaks, usually you can smell the gas or see it dripping fuel.
9) Make sure you've got a fully charged battery, and the clamps and posts are cleaned. Check the ground strap to the block.
10) Before you try to start it, turn the ig key on count to 10, turn it off, and do it again 5 times, then try to start it.
Are you sure you've got clean, fresh and healthy gas?
Let us know where you're at.
gNARLS.
you posted like your a expert at this stuff!
12-15-2011 | 05:56 AM
#80
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so i see this thread hasnt been up in a yr and i have a simler problem and i dont have enough post to start my own thread, thought i would use this one. i have a 86 22re i rebuilt i have tested all the relays, afm, resistor. it will start if i spray gas in the intake, i have hooked a miniture bulb up to the injector wire i have impulse,(light very dim) i can hook up a injector and turn it over and it wont spray, i have taken a 9v battery and jumped the injector with that and it will spray. i have hooked my test light up to the injector wire pos side and grounded it to the engine and get a bright light could this problem be in the g2 circut on the ignition or some ground. any help from you sharp toyota techs would be greatly appreciated.
