MAP sensor? Options

[bdog_v]

Hello my 94 celica GT has gone from running *only* at idle to not firing at all it is dead in the water. I have checked for spark and fuel both are there. I even installed new fuel injectors with no luck. So I am wondering if the MAP sensor can act like this when it goes out?


-I tried reading the codes after changing the fuel injectors and what I got was constant blinking check engine light, which I don't believe means anything. Then I disconected the Map sensor and hooked it back up and tried to start the vehicle with no luck and did the code reading one more time. This time I got a 31 which I believe is related to the MAP sensor, now I don't know if I got the code because I had just disconnected it and hooked it back up or if it is the problem???? ANy thoughts....




-Also they are very expensive so I was hoping to pick up a test sensor or two out of a junkyard, now I need to know what years and models of vehicles Toyota made that would have this same sensor? I know I won't find any 94 celicas in our junkyard, maybe a few of there trucks?????? THanks guys

[Bitter]

a camry of the same years should have the correct sensors as well.

[Dragondog]

http://www.6gc.net/forums/index.php?showto...50654&st=20


Check your battery voltage (should be greater than 11 volts), turn off all accessories, put your car in neutral, and make sure your car is at operating temperature.
Jump the terminals TE1 and E1of the "Data Link Connector 1" with a jumper wire (a paperclip will do).
Turn the ignition to "On" (but dont start the car)
Read the trouble code by watching the flashes of the check engine light

Code Blink Circuit
n/a - 8 flashes normal
12 - 1, then 2 G, NE signal (#1)
13 - 1, then 3 G, NE signal (#2)
14 - 1, then 4 Ignition Signal Circuit
16 - 1, then 5 A/T Control Signal
21 - 2, then 1 Oxygen Sensor Signal
22 - 2, then 2 Engine coolent Temp Sensor Signal
24 - 2, then 4 Intake Air Temperature Sensor
25 - 2, then 5 Air/Fuel Ratio Lean Malfunction
26 - 2, then 6 Air/Fuel Ratio Rich Malfunction
27 - 2, then 7 Sub-Oxygen Sensor signal
31 - 3, then 1 MAP sensor
41 - 4, then 1 Throttle Position Sensor signal
42 - 4, then 2 Speed Sensor Signal
43 - 4, then 3 Starter Signal
51 - 5, then 1 Switch condition signal
52 - 5, then 2 Knock Sensor
71 - 7, then 1 EGR System


code will always repeat itself so dont confuse it with more flashes..........so if it flashes 3 the 1 then 3 then 1 dont think its 4 then 3....ect..ect

This post has been edited by Dragondog: Aug 4, 2007 - 5:39 AM

[Gary]

Yes, if you disconnect the MAP sensor and try to start the engine, it will throw code 31.
Don't forget to clear that code so you won't get confused. (remove 15A EFI fuse)
There is a method of testing the MAP sensor using a volt meter in the BGB.
Here is for the 5th gen 5sfe map sensor but the procedure should be the same.

[bdog_v]

Well I tried another MAP sensor it still didn't fire. I tried cleaning out the throttle body. It still didn't fire. I put a manual fuel pressure gauge on the fuel line and had at least plenty of psi.I found a guy locally that works on toyotas exsclusively and he said that he believes the distributor has gone out, as the coil and everything is located inside the distributor. He had one toyota he sold slowly do exactly what mine has done, it had spark at the plugs and fuel but would not run. So I am hoping to try a distributor next.

-Does anyone know what might go in these distributors instead of replacing the whole unit????? And what it costs.

[Dragondog]

http://www.6gc.net/forums/index.php?showtopic=50654


no dbl posting, plz ask to have one closed.....gets confusing

QUOTE(Dragondog @ Aug 4, 2007 - 3:19 AM)

whooo slow down killa i know you wanna get it running but plz quit assuming things thats just gonna wast time and money......for one im guessing you are getting a spark right? MAKE SURE YOU HAVE A SPARK ON THE SPARK PLUG.....dont ASSUME you do just becuz you changed spark plugs and/or wires, second, like 6strngs said map senser...but dont go off buying things till you know what you are doing.....you wanna wast money share some with me, i got alot to do on my celica,.........but back to you, first find and locate the problem then solve, basic math.......let us know more


http://www.toyotacelicaonline.com/error.htm







definately! if it ain't broke then don't fix it. it's better to do a test to see if something is working before starting to replace things. chances are that your injectors were fine. probably your spark plugs and wires too if they were fairly new.


edit: ok if map is ok then just as i mentioned CHECK i repeat CHECK for a spark DONT...DO NOT ASSUME you do just cuz you replaced a few things...............you mentioned above you have spark but guy said could be distrebutor<<<<<<<<<<is the injrctors actually squirting fuel into cylinders?......DO NOT ASSUME!!!!!!! check>>>>try starting it the pull out spark plug and see if its wet with fresh fuel or smells fersh......if it is then you have no spark.....if there is no sign of fuel then fuel is not getting in there witch all means either way distrebutor....BUT FOR HEAVEN SAKES QUIT ASSUMING THINGS.........if you wanna be stupid then pull off a spark wire from spark put your finger in spark wire and start her up......let us know how it goes




before you go blowing time and money check to see if its the coil, check to see if its distrebutor, check to see if its distrebutor cap...............if your going to buy all this damn useless stuff that is still good mite as well swap engins too................toyota is NOT a damn ford everything DOSE not need to be replaced



if you are getting a spark and fuel is getting to cylinders then someone put sugar in your gas tank or maybe you dont have enough gas or maybe ou put in wrong fuel or maybe you used a water hose and filled tank up with water<<<<<lol what ever the case STOP STOP STOP ASSUMING>>>>>FIND & LOCATE then SOLVE

This post has been edited by Dragondog: Aug 4, 2007 - 10:45 PM

[6strngs]

^^ wow dude, calm down a little.

anyway, as I said before, if it were a fuel or spark problem, it's unlikely that they would all go out at the same time, so you would simply have a misfire and be running on 3 cylinders. your problem sounds more like all the cylinders are being affected. it could be a distributor because that gives spark to all cylinders. to check if you have spark pull all of the plug wires (so the car won't start) and spark plugs and stick one of the plugs into a spark wire the way it would go in, then holding the wire at the rubber top, place the threads of the plug against somewhere on your chassis (or any ground) next have someone else crank the engine. what I was told (and you might wanna double check this) that a blue spark is a good thing, an orange spark is too weak to ignite everything, and no spark at all obviously means you have no spark. try this test in all the plug wires to see how your spark is on all your cylinders. if you don't have any or just a weak one on one or two cylinders then I would look at plugs, wires, cap, and rotor. if you have none or weak on all cylinders then check the distributor or igniter.

[Dragondog]

^^ wow dude, calm down a little.

my bad sry

bdog
sorry if i insulted........just you know if your gonna ask for help then listen to our advise dont just post two of the same topics and asking for help then just going off doing things you dont understand...........post wait listen check....again simple math........but im sorry to insult....just dont ask for help if you wont take our help......im not sure but i think your contredicting yourself for example..............car wont start whats wrong? (then you answer your ownself) i think its the spark plugs......nope i put in new spark plugs still wont start, any help what do you guys think? (then again you answer your ownself) i think its the injectors, what do you think? i really dont wanna spend that much tho.......nope not the injectors just replaced thoses, car still wont start, what do you guys think?...ect ect.......................................

anyway do you see what i am saying....do not ask for help if your just gonna give urself random answers and not listen to ours.............sorry for the insult i dont mean to be rude to a fellow 6gen celica owner.............ur not the first iv did this too ....iv made a few angry with me because i got so mad when they asked for my help i gave my help and they wouldnt take it. but again im sorry.....g/f says i need anger managment

This post has been edited by Dragondog: Aug 5, 2007 - 5:20 AM

[bdog_v]

THanks for the apology, I started a new post as I wanted to start fresh at the Map sensor and I didn't want to confuse people with my spark plug issue. I didn't install the right plugs, (my bad I am new to toyota) I have that particular issue solved. Sorry if my posts seem to jump around and aren't very detailed. I actually am a fairly experienced mechanic, but have never owned a toyota. I already did all the basics before posting here, like distributor cap, plugs, wires, fuel filter etc. I didn't mention that as that is common sense to me. I have built multiport injected turbo cars, done full frame restorations. I just was looking for particular issues related to (toyotas) that I may not know of and new ideas that I am not thinking of to try. The MAP sensor was something new to try. I appreciate all ideas from everyone but please don't be insulting. *It is hard to know who you are dealing with over the internet* and without talking to them directly there can be plenty of miscommunication. I have masters degree in education.. I am not an idiot......I treat everyone with respect and expect the same from those I associate with. Sorry for the double post.... I'll let you guys know what happens after I try the different distributor.... Thanks for your help!!!!!!!!

[Dragondog]

i respect that you did not get mad at me kinda makes me feel bad now, ill try to keep in good graces , one thing that bothers me is i got 3 jobs and yet i still cant even afford to get an oil change and when i see someone blowing money on car parts they dont need cuz of failure to check if the original part is good or bad it upsets me.....i LOVE the fact that you are trying to take care of ur celica...i just wish i could do the same......but yea check to see if you got spark and/or fuel inside cylinders....thats the main thing then trace back from there all the way to distrebutor then coil(igniter).............plz test each one b4 tossing out cuz those parts may be good and may come in to good use for a broke man like me.....also this may not be it but im not sure how you checked if ur getting gas to injectors....maybe you pulled out a line and gas came out of it...if thats the case the gas that came out of it could of just been gas left in lines and fule pump may not be working........cuz what i was thinking of is when you started it and it puttered maybe it was useing fumes as well as what was in the lines then when you checked for gas inlines then rest of what was in there is now gone......but i may be wrong....just throughing in some options......let us know what else you find...or how your progress is going......you may already know this but when you pull off gas lines always unscrew gas cap to release pressur other wise pressur is forcing gas through lines wether pump is working or not

This post has been edited by Dragondog: Aug 5, 2007 - 3:11 PM

[toyotacrazy]

Well I tried another MAP sensor it still didn't fire. I tried cleaning out the throttle body. It still didn't fire. I put a manual fuel pressure gauge on the fuel line and had at least plenty of psi.I found a guy locally that works on toyotas exsclusively and he said that he believes the distributor has gone out, as the coil and everything is located inside the distributor. He had one toyota he sold slowly do exactly what mine has done, it had spark at the plugs and fuel but would not run. So I am hoping to try a distributor next.

-Does anyone know what might go in these distributors instead of replacing the whole unit????? And what it costs.

I have a distributor and a coil. In good working order. PM me if interested

[bdog_v]

Well guys I just got home from working over the road and threw in the new used distributor and the old girl fired right up, runs just fine now. I am guessing it was the coil in the distributor not positive though it was definitaly in the distributor. Hopefully my experience will help someone else solve this problem faster with spending less money!!! THanks for all the advice....