odd issue... pulsating rpms? PROBLEM SOLVED!!!

D15, D16, D17 and Mini-Me swaps
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By TrailerTrash
- Fri Feb 17, 2012 4:21 am #295248
Apexracing wrote:Back that white screw out all the way and pull out the guts and realy clean and wipe them down. Then put it back together


plan on making a tool to unscrew that white thing and cleaning it this weekend. a screwdriver dont cut it.

stopped at the gas station tonight and came back out to the same damn starting issue again... almost 200 miles and dozens of stops without aa problem then bam... :x :x :x WTF! and no code either

changing my engine coolant tempature sensor this weekend. i bought it last weekend and didnt install it after the IAT sensor seemed to fix the problem. hopefully it helps i seriously dont know what else to do anymore

:(
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By Apexracing
- Fri Feb 17, 2012 4:25 am #295249 did you check all of your grounds. Just asking, also i would grab another ecu and try that out.
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By TrailerTrash
- Fri Feb 17, 2012 4:33 am #295250
Apexracing wrote:did you check all of your grounds. Just asking, also i would grab another ecu and try that out.


yeah ive checked and rechecked the grounds. ill have to check around and see if anyone i know has a spare p28 layin around
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By TrailerTrash
- Sat Feb 18, 2012 5:02 am #295349 couldnt get ahold of a p28 but I do have a p06 in my garage I guess I can try it if the coolant temp sensor doesnt help at all.

speaking of which im pretty sure thats the problem cause it was idleing perfect and i unplugged the CTS and right away the revs kicked up and got sputtery. plugged it back in and went back to normal. crossin my fingers.

on a side note anyone know what this top metal tube at the top of the throttle body is for? some kinda tube supposed to go somewhere?
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and i was looking at my injectors and something caught my eye... i know the wires are electrical taped together:roll: but whats with the extra wire thats been cut off? my cars quite the hackjob in quite a few ways so who knows where these came from. any input on the injectors will help. someone said about injectors could be causing the pulsing revs? im going to the junkyard tomarrow to price a complete intake manifold setup with all the sensors and injectors blah blah blah. might do a Y8 manny swap
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Image :roll:
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By Apexracing
- Sat Feb 18, 2012 5:09 am #295351 That white thing isnt a wire lol
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By TrailerTrash
- Sat Feb 18, 2012 5:14 am #295352 looks like a snipped off wire :? :lol:

will z6 injectors work on a d15b?
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By teal_dx
- Sat Feb 18, 2012 5:24 am #295353 That white thing is just a plastic num that they have - not sure why it is even there :?

As long as both sets of injectors are OBD1, they'll plug right in :thumb: No need for a resistor box or anything.
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By Apexracing
- Sat Feb 18, 2012 8:59 pm #295394 heres a shot of my stock d16z6 intake manifold
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Heres where that nipple off the throttle body should go.
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Goes down to the charcoal canister. If you need any other pictures lmk.

Pulsating rpm

By anya2dgre
- Sun Feb 19, 2012 1:52 am #295423 Try pulling out each of your plug wires and checking if there is any oil in there. Then you might have to reseal your tappet pan and the seals around the spark plug holes. It happened to me recently.
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By TrailerTrash
- Sun Feb 19, 2012 1:55 am #295424
teal_dx wrote:That white thing is just a plastic num that they have - not sure why it is even there :?

As long as both sets of injectors are OBD1, they'll plug right in :thumb: No need for a resistor box or anything.

sweet thats what i wanted to know :thumb:

Apexracing wrote:heres a shot of my stock d16z6 intake manifold
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Heres where that nipple off the throttle body should go.
Image

Goes down to the charcoal canister. If you need any other pictures lmk.


ok cool. ill compare the pics to mine tomarrow im not sure where the hoses from my charcoal caanister are running to. my car is pretty much the definition of slapped together :lol:
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By TrailerTrash
- Sun Feb 19, 2012 8:45 pm #295487 my charcoal canister had an open end on it that wasnt hooked to anything so i ran a line from that little tube on the tb to the end on the carcoal canister. i really have no idea what its supposed to do but it only took 40 seconds to do.

changed the coolant temp sensor and now it seems to start just fine when warm but thats what it did all last week too :? so well see how it goes
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By TrailerTrash
- Wed Mar 07, 2012 4:19 am #297313 well its been a few weeks and not one starting issue! :woot:

I got curious and hooked a timing light up to the car the other day and if I am looking at it right, at idle, the timing is way off. the 3 marks on the crank pulley(2 white lines and 1 red one in the middle of them) are about an inch away(toward the front of the car) from the thing on the cover they are supposed to line up with
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i really dont know much at all about timing and pretty much all I can find when searching google is about the cam timing lining the cam gear up and all that. i cant seem to find anything about usuing a timing light to set the timing, and more importantly which lines on the crank pulley i should be using :? :? ive read that its supposed to line up with the red line then ive read its one of the other lines i really have no idea

any info at all would help!
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By TrailerTrash
- Sat Mar 10, 2012 11:16 pm #297760 fixed the problem FINALLY it was... wait for it... ignition timing!!!

did ALOT of research googling and searching d-series.org and HT and got alot of info on the subject.

hooked up the timing light, jumped the service connector thingy, started her up and let her warm to op temp, loosened the dizzy bolts, and cranked the dizzy till the red mark lined up with the needle thing on the timing cover. it actually wasnt off as much as i first thought.

now she starts idles and runs PERFECT. It actually got rid of a kinda shuddering when it first starts up that I always just figured was the stiff motor mounts. but no more of that, and most importantly, no more pulsing rpm problem :woot:
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By Apexracing
- Mon Mar 12, 2012 4:20 am #297877 awesome!!

By crazy-88
- Sun Nov 11, 2012 9:43 am #319732 extreamly useful thread! I'm having similar issues.
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