Weird missing problem!!
 

alright i have a weird problem! I had a ---- load of problems with my car... problem after problem... I had a weird cutting out problem u guys might of remembered. blah blah found out i think it was the head gasket. Changed head gasket etc ran ok for about a hour....

then here is the new prob. Car just straight up runs like absolute ---- like its sitting there missing like crazy or running on only 2 cylinders or something. Thats what it sounds like! Anyways!! My engine was pretty beat so i swapped it out for another perfect running one a friend had! I used everything from my old intake manifold, injectors, wirring harness sensors etc... Come to start it up and its doing the exact same thing it did before with the old engine!!!!!!! What the ---- could be causing this!! No check engine lights nothing!! Its got spark in all cylinders, getting fuel, new plugs, changed dizzy,

the only thing i can think of maybe being the problem is something to do with the injectors... maybe dirty?? Could a bad wirring harness be causing it somewhere to run like ---- like this?? Even without check engine lights?? I dont know im lost!!

93 civic d16z6 14b crome.



http://vids.myspace.com/index.cfm?fu...oid=1994176530

Ok guys here is the vid of what the ---- is going on!! The first part of the vid is with the same chip that its been running on for 2 years and it sounds like its missing really bad!! The second part is with my other chip i burned for the stock map sensor and it makes a weird popping snapping sound.....


UPDATE!!!!!!!

ok well i got the car to atleast run now! Changed maps, injectors, and resister box.... but as soon as it hits boost it starts missing like crazy and runs like complete ---- but only in boost!! Here is the vid! Listen to how it hesitates in the vid... Dont mind the compressor surge my bov isnt hooked up lol!!

http://vids.myspace.com/index.cfm?fu...oid=2012216686

Re: Weird missing problem!!
 

check if your purge solinoid and iat sensor wires aint messed up i have a obd2 civic converted to obd1 via a harness and i had the purge solinoid and iat wires sweitched around and the obd2 didtn throw a code but it ran fine but when i put the obd1 ecu in it ran likc ----! and poped my iat sensor i guess it was trying to purge the iat risistor lol anyway just chech your sensor wires bye a good wire diagram not by location but by exact wire color so they match like the map and tps have same plugs but diffrent color just check it out wiht a good wire diagram check all the colors and use a volt meter too lik so you can see the vcc1 wich is the 5 v supplay to map and vcc2 to tps just check that stuff out and double check i dout its the injctors cuz thats wat i thout.. and it wasnt also make sure to tak out you iat probe you have a obd1 car so its in the back of the intake manifold and see if the tip melted if it did teres your problem youll have to replace it cuz it will bbe telling the ecu your intake air teim is like 280 degrees f and it will yank fuel and your motor will run like ----!


good luck

Re: Weird missing problem!!
 

awesome bro! IM gonna go try all that stuff!! Thanks for the info! Thats really good info and it seems like u understood my problem really well! Thanks man!

Re: Weird missing problem!!
 

wat kind of car do you have man... and did you have any luck fixing the proble..

Re: Weird missing problem!!
 

93 civic d16z6 14b crome

nah the wires werent mixed up!! damn... BUt umm i havent pulled the sensor out yet to see if it melted?? hmm i will have to check that too.

Re: Weird missing problem!!
 

might as well man.. also check your ecu if any componets burnt out in it
???

Re: Weird missing problem!!
 

alright wasnt the intake air temp sensor.! But what i noticed is it does it from the second i start it up cold and it doesnt change as it gets warmer other then get worse. So since thats open loop and its doing it. Doesnt that mean it doesnt run off the any of the sensors until it gets hot? Sooo im guessing its probbaly not any of the sensors. Since it does it while hot?

Re: Weird missing problem!!
 

May sound dumb but have you changed your plug wire's?

Re: Weird missing problem!!
 

---- i dont know wat too say im too sleepy sorry so if its running oil loop and stays running open loop thne its the CHT the two wire sensor under the dizzy the cylinder head temp sensor ( the one that the ecu reads)
the other small 1 wire is for your temp guage on you dash!
later nigs

Re: Weird missing problem!!
 

what about your crome map, sure thats not it??

Re: Weird missing problem!!
 

well i thought that too... BUt its the same map ive been running for over a year and its never been a problem since then. I dont know why it would suddenly make the car run like crap since nothings changed on the car?

Re: Weird missing problem!!
 

no no, im sure the car still functions going inbetween closed and open just fine. IM just saying when its open loop and closed it runs like crap. And i believe open loop is when its not running off any of the sensors. So i doubt it would be any of the sensors. other then the ect and iat because i changed them both.

Re: Weird missing problem!!
 

Does it seem to run extremely rich at idle? Seems to clean up a little if you rev the motor? If that's the case try switching the plugs for your tps and map sensor. They're pretty common ones to get mixed up, will cause your car to run like complete ----, and won't throw any codes due to the fact they both use the same voltage range.

Re: Weird missing problem!!
 

hmm.. I will check asap tommrow.. It does seem to run really rich at idle like u said. I doubt there mixed up but that would deffiently make sense! I will check tommrow! Thanks bro!

Re: Weird missing problem!!
 

o yea is there anyway my resister box could be somehow causing this?? I dont know why i think this but for somereason i think its in the injectors somwhere?? Anyway to physically check the resister box i wired in?

Re: Weird missing problem!!
 

Are you running a resistor box with dsm 450's? The old "blue top" 1st gens require a resistor box, you'd know if it wasn't hooked up right. In the obd1 connector plug there's 1 12v power in, and the connector branches it to the other 4 wires leading to the injectors. Just find which wire is power, splice it into the red wire on the resistor box, and all the yellows from it go to the low impedance injectors.
Otherwise, if you have high impedance injectors (standard obd1 style) it'll def. not run right with a resistor box. If you're not sure, do an ohms test on the injectors to find out which one's you have.

Re: Weird missing problem!!
 

dam it throw that car away. sorry im useless

Re: Weird missing problem!!
 

Is it minimed? im sorry, im at school and i glanced through the post from what i kno it sounds like a minime formt he 3 posts i read, my friend did a minime with a vtec ecu and it idled like the bitch was cammin, we later found out after tons of work that he jsut had a damn auto ecu, so check them simple things first, cuz i punch people int he dick that forget to check the simplest

Re: Weird missing problem!!
 

not a minime swap.. JUst a stock d16z6...

Re: Weird missing problem!!
 

lol rene thats honestly what i want to do... This car has been raping me...

Re: Weird missing problem!!
 

You said that you don't think it's any of the sensors because it does this on closed loop? Wouldn't that be indicative of a sensor malfunction?

Re: Weird missing problem!!
 

ok well i had the current map on the chip for my old 2.5 bar motorolla map sensor. So i decided to reburn it for the stock one... Now it runs completely different but still ------- like ----...

When i first start it up it seems to run ok until i let let off the gas and let it idle.. From then on until i shut it off it runs like ----... This is ------- weird man lol...

Re: Weird missing problem!!
 

http://vids.myspace.com/index.cfm?fu...oid=1994176530

Ok guys here is the vid of what the ---- is going on!! The first part of the vid is with the same chip that its been running on for 2 years and it sounds like its missing really bad!! The second part is with my other chip i burned for the stock map sensor and it makes a weird popping snapping sound.....

Re: Weird missing problem!!
 

anyone??

Re: Weird missing problem!!
 

kinda sounds like boost cut or compressor surge in the video, but I didnt really see a turbo/ piping or parts distinctly. It is boosted right?

Re: Weird missing problem!!
 

It cant be boost cut considering im not making any boost while just sitting there. There is compressor surge but only because my bov isnt hooked up to a vaccum source!!


somebody told me that it might be one of my injectors stuck open!! So the only way i could think of to test that theory was to turn my car on and watch my fuel pressure guage!! It stays at 60psi while running and as soon as i turn the car off it drops to 50psi and then very slowly decreases.. any ideas??

Re: Weird missing problem!!
 

stupid owner ??? j/k, might be an injector, do all your plugs look the same

Re: Weird missing problem!!
 

ok well i got the car to atleast run now! Changed maps, injectors, and resister box.... but as soon as it hits boost it starts missing like crazy and runs like complete ---- but only in boost!! Here is the vid! Listen to how it hesitates in the vid... Dont mind the compressor surge my bov isnt hooked up lol!!

http://vids.myspace.com/index.cfm?fu...oid=2012216686