Before I start I would just like to say i been searching, still searching and will continue to search but this site has helped me tons in the past so going to post this just for insight.
B16A
Spark, Fuel, Compression and cranks for days but just wont start.
Sounds like it might catch for just a split second but then just keeps cranking. Any ideas? Thanks for any and all advice. First motor in 5 years I just can’t get to fire up. I’ve never had this kind of an issue. Even a motor with a few bent valves I managed to get running enough to limp home.
Fuel, spark, compression, and timing - you claim that you have the first three.
Assuming the gas is good, I would start looking at timing. Try this link - http://www.clubcivic.com/board/showthread.php?t=136354
There has been a lot of discussion about distributors being 180 degrees off, and if your mechanical timing marks all line up at top dead center - this piece about JDM and USDM distributors might help.
Alright well i finally got it started but in order for it to start I have to hold the throttle at wide open and once it starts I must hold the revs at 1500 or higher or it stalls out. Any thoughts on that?
Fuel filter not to sure about, no it wont idle wants it get’s to temp(already thought about that one), ecu is oem LS but I have run countless b16/gsr swaps on LS ecu’s just to get em running so i don’t see why all of a sudden it would cause me an issue. But again I am looking for ya’lls guidance so I’ll take any clues
Replace the filter… or at least check it out. Either hook up a pressure gauge or try to blow through it. If its clogged, that very well may be the problem. Could be a cheap fix if that is the issue.
alright motor runs, pulls, but just wont idle unless i keep the RPM’s up. trying a new throttle body gasket and cleaning all sensors to see what happens. Anyone know where a good write up is for cam seals? not the one by the vtec silanoid(spell) but the ones by the cam gears
Check that the plug for IACV is correct. I forget which other sensor shares the same plug but they both use the same connector. Its very easy to mix the two of them up.
@unified: Yes it will cause a CEL, but the op never mentioned if he had a CEL or not.
@1slw4dr: Did you swap the IACV with the motor? If so it may be the case that it’s bad. TEST: Momentarily jump pins A9 and A23 on your ecu with the car in the on position (engine off). The IACV should click. If not, then the connection or the IACV is bad.
Other possible causes:
I'm assuming you lengthened the MAP sensor wires. (the DA/DB map sensor is on the firewall) Make sure you connected it properly and you soldered the wires.
If your TPS sensor has been tampered with or you have an aftermarket throttle body. Ensure that the TPS is calibrated properly. Should read 0.5v(closed) and 4.5v(WOT)
My map sensor is in the stock location. I never bothered with the extending the wires cause it’s easier just to hook up a vaccum line. The IACV is the one that came with the swap and I called the kid who had the motor before me last night and he said it never idled for him either. It’s becoming quite the bother. Car doesn’t throw any check engines, doesn’t hesitate on acceleration, or seem to have any noticeable loss in power. The previous owner said he shaved like .040 of an inch off the head. Could this be altering the timing enough to cause an idle issue?
Alright tried adjusting the idle screw, throttle cable, and cleaned first, then changed for different IACV still no freaking luck. I’ll keep on keepin on but thanks for all the help so far guys. I’m just frustrated beyond all belief and as far as I can tell threw my Google hunts, honda-tech, and such sites no one has had this exact problem before so IDK
having the head milled will throw off the cam timing a little bit but i wouldnt think it would keep it from idling
if you have adjustable cam gears i would try to adjust them and get them lined back up at tdc
did you see if the ports for the iacv may be clogged causing the stall …just an idea
Ya I looked and it all seems clear on both the IACV I checked. Milling the head would retard or advance the cam timing? I’m just looking into every possible conclusion and the only one’s I’m getting I’ve already tried. Thanks again everyone for all the theorys.
Why did the previous owner mill the head? Do you know if it started acting like that before or after the head work was done? Head work is a red flag to me if a cars has issues like this after it was done.
Did you try a different ecu than what it came with?
I’m running it on the stock LS ECU which I’ve done a dozen times in the past on other cars and I don’t have any check engine codes. He said he milled the head to get the extra bump in compression. I didn’t think to ask how it ran before he altered the head but I can try and get ahold of him again to see.
Since the head was milled is it possible for the cam timing to be out? I herd even 1 tooth off on a B16 and it wont hold idle?
Now the car is idling randomly, one minute its 1200, then 3500, then 2800, then 2000-2200, WTF IS GOING ON LOL!!! I have NEVER seen a car act like this before in my life.