Heres what happened. I recently tuned up my 22re in my 86 4runner. Had to do the TPS, and O2 sensor. Did the plugs, wires, distributor cap and rotor since its got 330K+ KMs on it. Had it purring like a kitten for a couple of days until the other morning when I started it to warm it up and walked a way for a minute. I could hear it running in the back ground and then suddenly stop! Ok, just looked like it stalled so I try and start it and it just turns over but never kicks over. The computer code reads 6 which is an ignition problem according to the book. So I check for spark at the coil and nothing. Checked the pick up in the distributor and its fine. Ok so I replace the Igniter and coil. Still nothing, so I try another thinking, (hoping), the last one was bad as well. Tried it and still nothing. I'm not sure what to try next. Still getting code 6 from the computer. PLEASE, any thoughts on what to check next would greatly be appreciated

try this, have someone try to start it while you are under the truck taping on the gas tank with a wrench or screwdriver handle if it starts you need a fuel pump, along time ago a old man told me to do this and it worked as long as I was taping the gas tank it ran but once I stoped the motor stalled, try it.

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If you build it they will come.

Ok. I know this trick but why would a blown fuel pump cause it to have no spark at the coil?

timing chain possibly snap, I dunno if that would bring up a ignition problem reading but it would answer for the no spark

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Yota Anyone?

I don't think its the timing chain because I've done a compression test on it and it checks out ok. I'm thinking ECU or ignition switch? If it was the ECU then I shouldn't be getting error codes right? Anyway of testing this stuff?

Ok this may sound silly but I had a 86 Lincoln and the fuel pump went, I tried everything to get it started, power to the ignition modual, but no spark, I couldn`t figure it out, I didn`t think it was a fuel related problem so I didn`t check if ther was fuel in the rail, I had it towed to a garage close to here and the guy tried a few things dropped the tank put a fuel pump in and it started, when something of mine dont start the first thing I look for is spark and work from there, It will only take a sec to try, if thats not it then you can rule out the fuel pump. Anyone else ever try hitting the tank to see if the pump is gone?

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If you build it they will come.

Do I wack on fuel tanks to verify no fuel pressure/pump failure? yep almost daily infact. Though I work on GM stuff only this is the most common quick test there is. With you Toyota though I would test spark first and if none go and test all the fuses. If you find a fuse blown then off you go hunting a short in the wiring (this is most likely in a 4x4). Timing chain is easy to check also, just remove the dist cap and crank the engine the rotor will turn when engine is cranked.

Be very carefull using that code as it may set because the engine is not running which could be normal, GM system have a code 12 that goes away as soon as the engine runs, it is sort of a self test. Does the check engine light come on? Do you hear the fuel pump running? Is there spark? Fuel tank full? I do this for a living and that last question is not as dumb as it sounds. best of luck.

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Me Tarzan u ? Favorite tool?
Monkey wrench!
I am the original shade tree mechanic

Thanks tarzan I was starting to think I was the only one that knows this trick, it sure does save alot of time when you are surching for the problem.

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If you build it they will come.

Oops, after re reading your post I realised that you stated there is no spark. Still look for a check engine lite. Test for spark at the plugs if none then check for spark into the dist - this isolates part of the dist. If still no spark then get a test light for the next tests. With the test light grounded you should have battery voltage on one side of the coil (black wire with red stripe)with the iginiton on. The other side of the coil is tested by attaching the test light to battery voltage and then testing the other terminal, the lite should flash as the engine is cranked. You can also test the coil if you have a digital volt meter (DVOM).

Since you have replaced the coil/igniter and tested the pickup (how was this done?) chances are you are dealing with a wiring problem or maybe bad coil wire.

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Me Tarzan u ? Favorite tool?
Monkey wrench!
I am the original shade tree mechanic

Good suggestions. I haven't had a chance to try any of them out yet but I'll let you know the out come. One question, if by chance the fuel pump is gone is it possible that the system detects no fuel pressure and cuts power to the coil etc.? I'm just wondering if anyone knows this for sure for my own curiosity.

No the ecm can not shut off spark based on fuel pressure. The ecm can shut off injector pulses and spark if it goes down and possibly the fuelpump too. The ckts that feed the ecm are also common to the fuel pump if they fail both ecm and fuel pump become inop - this is getting beyond what you could deal with I think.

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Me Tarzan u ? Favorite tool?
Monkey wrench!
I am the original shade tree mechanic

I`m still sticking with the fuel pump, they are easy to change toyota was thinking when they made the runners, under the passenger rear seat there is a inspection cover take it off and there is the sending unit looking at you, test there to see if you have voltage going to the pump (sorry can`t help on what wire to lazy to look in the book I just got up) if there is power but you can`t here the pump come on, replace the pump and problem solved.

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If you build it they will come.

After snowmans post and rereading your post I have a question and do not take this the wrong way. How did you check for spark at the coil? To check for spark "from" the coil did you remove the coil wire at the dist. cap and hold it close to a grnd. while someone cranked the engine? If you pulled the coil end off and tested there then yeah you would have no spark. I know this may sound dumb but since I do not know you or your skills nothing should be taken for granted, I would hate to see you sent down the wrong path. No offense meant ok.

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Me Tarzan u ? Favorite tool?
Monkey wrench!
I am the original shade tree mechanic

No offence taken. Believe me, I know alot more about mechanics than I'm making out here. I'm just throwing out the most basic questions about a, probably more serious, problem to get as much feed back as possible since I’m stuck. I have checked most of what your suggesting with regards to spark prior to posting. I have a spark tester and I have tested for spark right from the coil and from the coil wire on top of the cap to make sure the cable was not bad even thought I just replaced all the wires. I haven't had a chance to try anything with the fuel pump just because I'm really busy these days and don't have a shop to work in anymore. Its also been F'n cold at night and working in the drive way in the dark and cold sucks, I've had to do this alot lately.

Snowman - Thanks for the info. on the access port. I didn't know about this not really being a Toyota guy and that should make things alot easier to check. Boy, give me a Ford or chev any day with a problem I could probably tell you whats wrong any day, but these toys are new to me.

Tarzan - I do appreciate the help.


[This message has been edited by CGBronco (edited January 22, 2002).]

Good luck man hope you get it running.

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If you build it they will come.