Hi all I have the strangest thing happen to my car today. Started it fine pulled into garage was checking maf sensor cleaned it and removed snorkel to intake. Saw dirty butterfly valve so i cleaned it with some degreaser went to start car with snorkel still off and all it does now is crank but wont start?? I tried pulling off coil packs to check for spark I saw one plug spark...but after that nothing else Im wondering if computer is shutting them down.. I checked for voltage at connectors when trying to start and nothing....Checked packs with ohmmeter and getting 400K ohms between ab pins and ac pins, bc pins 1.2K ohms.Took out all 4 plugs some had crap on them from i think the degreaser so cleaned them and look ok. Did see gas getting into pistons could smell it and wet. I think theyre fine put everything back together tried to start and it almost started a little putter. Might try reseting comp by pulling battery for 10 mins but I dont have any codes either. Doesnt make sense ? Unless the fuel pump is weak going to try to check it for pressure Any help would be great thanks

 

What year/model/engine? US model? Theft light on or flashing? Does it start with the MAF disconnected? Possibly the MAF did not like being cleaned. It could have been borderline. Sounds like your getting fuel so need more info on the car.

 

Oh sorry its a 2000 1.6 liter made in japan as far as I know I didnt try to start without maf disconnected I read somewhere that resistance of maf is under 16k. It was puttering a few times later almost started but then no go.I could smell that damm degreaser I used Will it start with maf disconnected...I think I might have tried that and It didnt start or even get a code thanks No theft light flashing

 

I would remove the plugs and the fuel pump relay,crank it over to clear the cylinders and clean the plugs good. You could try starting fluid so it can clear it's throat. Lots of things could have happened. The MAF might have gotten blasted with degreaser if it spit back (backfire through the intake) the MAP could be contaminated and need cleaning. Hard to say from here really.

 

I took maf out and its fine I even cleaned the little expoxy incased bulb since it was dirty a bit and i never cleaned it first time..I did have plugs out and used a air line to blow out plugs and cylinders before. I did try squirting some gas in intake but not much yesterday todays another day going out there soon thanks

 

Well spent the whole day on this ...again....removed egr and cleaned it as I wanted to this before but had no time checked all connectors to all other sensors all good including coil packs... for a few secs it does almost start but thats it. I dumped some gas into manifold and still wont go...Removed coil pack plugs and checked for 12 v when cranking and nothing on any pin....ooh oh sounds like comp shutting them down...could a messed up timimg belt cause this ? hmmmm this whole thing deosnt make sense as car was running fine before i did the cleaning of maf and butterfly valve I do see theres a square whole in the throat i did spray degreaser in there and it looks like some kind of solenoid looking thing as it does have a connector at end...But I wanted to remove it but its got damm phillips screws instead of bolts....geez what a dumb thing...Pulled all plugs dried them and blew out cylinders still no go...checked varoius grounds attached to motor and area cleaned them still nodda....Checked all fuses inside cabin and motor fuse holder all good....I guess Im taking my truck to work tom.....ugh

 

It's a pretty simple ignition system. The crank sensor sends an AC signal to the PCM for ignition. The cam sensor sends an AC signal to the PCM for injection. I assume your car has the single coil pack. With the key on you should have 12 volts to the ignition coil. The PCM grounds it to fire a plug via the crankshaft position sensor signal. I would inspect the ignition coil connections closely. Old plastic gets brittle and breaks quite often. If it broke a timing belt or lost compression it will spin over really fast. You can get the compression back with a little oil in each cylinder. I doubt it broke a timing belt. If you do not have 12 volts to the coil check the main relay and the gauge fuse in the inside fuse panel. Swap the big fuses under the hood around or test them with an OHM meter. When cleaning the throttlebody or MAF you use MAF cleaner that leaves no residue. Any residue will insulate the MAF hotwire and tell the PCM that no air is entering the intake through the air cleaner so it shuts down spark or fuel depending on the manufacturer/model/year/etc. I soak a rag in brake cleaner and open the butterfly by hand then wipe it clean. A high mileage car i will remove the TB or ETM and bench clean it. Dunno if you are holding the gas pedal to the floor when starting it but you say it tries to start. Hold the pedal to the floor and rev it high a second or two if it does start.

 

Thanks again for your help so its sounding more like that damm maf sensor I used contact cleaner on it it shouldn't leave film on it? Or the tech spray...degreaser..Because that's the only thing I touched besides cleaning butterfly. I did pop off line on fuel rail and gas flies out when I held in relay in fuse block...I did take plugs out dry them and put back in. I tried the gas pedal to floor trick the other day. Just tried gas to floor and again tried to go but no go

 

Ok heres the latest i was able to verify crank pos sensor sending power to coil packs to spark coil packs plus I can see spark plugs sparking. Skinned back 3of 5 wires on maf sensor found signal wire going in seems alittle low of 3.5 volts plus about .5 volt back on 2 return wires... still no start...even got jumper cables from my truck to start it and nothing....Took off TB with butterfly valve off cleaned assembly removed 2 small hoses on bottom of TB Looks like a solenoid valve I took it off cleaned it and tested it with 12vdc and it works....Reconnected it into car on its plug turned on ignition it doesnt work??? Skinned both wires to find 12v wire which is red wire white has a broken or bad ground so i ran a jumper to battery. But I still had snorkel off and maf disconnected so when i tried to start it almost went but after a few times I think its flooded since I can smell gas...Got laptop connected found 2 error codes maf sensor and another I cant remember what it was maybe P0112 anyhow cleared codes. Tried to start and had breather intake blocked with my rags LOL. But she still no go...Enough for today on nites ton.....but I now know I have, spark, fuel just not sure pressure but when I took off rail connector it flew outta there....air unless that damm MAF is still flaky.....thanks again

 

Hmm, sure sounds like the MAF. Obviously i can't say for sure. Be careful throwing 12 volts at stuff. Not everything runs off of 12 volts and damage can occur.