MY99 power surge
MY99 when accelerating at full throttle between say 80 and 100 (private road) engine seems to sort of surge power then hold back then surge again etc etc.
Any Idea's |
clean out the boost sollenoid
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Would a bad MAF cause that sort of problem? I noticed mine doing this quite badly on the 3hr drive back home. Majority was all motorway or dual carriageway, but sounds the same.
WOL in 4th or 5th and the car "pulses" as it's accelerating. Stefan |
Is the boost sol. the thing with denso written on it part no. 16102AA160 with two chuncky pipes (one goes to inlet manifold, 1 goes to air intake - engine side of maf) and a blue elect connector ??
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http://stefanostadal.homedns.org/ima.../ground_01.jpg
Is it the blue thing under "VE" in DRIVER Sorry Stef !!!!! |
Or does anyone have a picture :):)
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Originally Posted by tmo
http://stefanostadal.homedns.org/ima.../ground_01.jpg
Is it the blue thing under "VE" in DRIVER Sorry Stef !!!!! Good Luck David APi Engines / APi Impreza |
Thank you David :thumb:
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LOL; no worries m8.
At least now I know what to try too :) |
:)
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All sorted. :thumb:
Didn't take long, apart from the amazing dissapearing nut (under the air filter assembly, soon recoverd though!!) gave all the pipes a good clean out ;) the "joining the two green wires" works a treat. |
the "joining the two green wires" works a treat What'd you use to clean the pipes? Stefan |
Yep, everything starts clicking and whiring, make sure you have removed the pipes first and have the sol. unbolted and ready. Connect the two green wires and off it goes !!!! Ensure you have a rag to soak all the sh!t up that comes out of the ports one you start spraying. Best to wrap the rag round your hand and sit the sol. in it. Gives a bit more control on the angle of spraying. (You will see;) )
What'd you use to clean the pipes? Same thing, tin of spray brake cleaner works a treat :):) |
Right, so let me get this straight in my little head.
You unplugged all the tubes and unbolted the sol first. You left the lecky connector connected and started the car Then you connected the two green connectors under the dash (inc. the black for the reset procedure ???) Then sprayed some brake cleaner in about it and had it wrapped in an old rag so it didn't blow the cr@p all over you and the engine bay :) That about it? Stefan |
Originally Posted by ozzy
Right, so let me get this straight in my little head.
You unplugged all the tubes and unbolted the sol first. yep You left the lecky connector connected and started the car - yes and no Then you connected the two green connectors under the dash (inc. the black for the reset procedure ???) yes and no Then sprayed some brake cleaner in about it and had it wrapped in an old rag so it didn't blow the cr@p all over you and the engine bay :) That about it? Stefan As you said, Pipes off Sol. unbolted (bottom nut likes to go for a walk under the air filter assy.) Connect green wires under dash Get can of brake cleaner ready Hold sol. in large rag Turn on ign. DO NOT START THE ENGINE All valves, sol. etc and fan start to cycle, so lots of clicking / whooshing going on. At this point Sol. should be pulsing away, so holding it in the rag give it hell with the brake cleaner up both ports. Really give it a good internal ;) soaking until you A- get tired B - Get completely covered in dirty fluid C - fluid running clear out of sol. (and up arm / side of car) is clear. Once satisfied give it a blast for luck then turn off ignition and let valve drain / dry out whilst turning your attention to the pipes. Remove pipes one at a time (remember which one goes where!! think the bent ended one goes to the back ) and again give them hell with the brake cleaner, Let them dry out for a couple of minutes and then re-fit. I also cleaned out the small Dia. hoses that run from the T piece to the actuator. If you have a look you will see :) bloody little clips that shred your fingers!! Refit sol. (retrieve bottom nut from under air filter assy) Complain about the ridiculous size of hand required to fit bottom nut (retrieve bottom nut from under air filter assy again) (remove air filter assy as an option - its a lot easier to get at the little bugg@r) Re-fit pipes after routing back through adjustable cable ties Start her up, and go for a bit of a run And that’s about it!!! Hope this helps Tim |
cool, it was the starting car bit that threw me.
I'll ask my 12yr old sister to re-attach the solenoid nut ;):) Thanks again, Stefan |
oh, and another question.
When you had the surging, did you notice the boost actually change (assuming you have a boost gauge)?? Stefan |
Originally Posted by ozzy
oh, and another question.
When you had the surging, did you notice the boost actually change (assuming you have a boost gauge)?? Stefan Tim |
Want to do this in my 93' WRX Ra.
Is the solenoid the one that is vertical denso part 16102 etc? Mine has 3 pipes off it thats all. Then drop oil level afterwards to proper level, is that correct? Then ecu reset? Thanks Tom |
It was the MAF on mine afterall
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Originally Posted by tmo
All sorted. :thumb:
Didn't take long, apart from the amazing dissapearing nut (under the air filter assembly, soon recoverd though!!) gave all the pipes a good clean out ;) the "joining the two green wires" works a treat. i have a MY00 with a SECS unit so i can reset the ecu from there...bloody annoying that i've got to do it all over again tho ;) |
bttt
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Where are the greens wires? Drivers side?
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On the drivers side tucked up behind the trim around where your left knee would be if you where sat in a normal driving position. You will find two black and two gren wires, might be taped together in colour pairs i.e. green and green etc. They arn't the biggest things in the world !!
Tim. |
they have black connectors on them, my car is back to running perfect after cleaning the thing too, so thanks all!
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:thumb:
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all seemed fine until this evening; open throttle in forth i heard a bit of a bang and then had a massive surge forward. thought i'd best check the maf (assuming it is the sensor on top of the airbox pipe), i unplugged it, car coughed a little but carried on running...I guess i’m about to be around £70 out of pocket for a new one?
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Better to change it (£70 or LOADS for a re-build)
Mind you 2.5ltr :norty: |
Originally Posted by tmo
Better to change it (£70 or LOADS for a re-build)
Mind you 2.5ltr :norty: |
done!!!
ta for Paul at XS for the MAF, car pulling like a good 'un again especially in top where we are back to silly speeds with no effort or surging...thanks all for advice :) just a word of warning, DO NOT use a plain posi bit and try and knock the security tabs out of the middle. I did and ended up hammering an allen key into the bolt 'cause i destroyed the posi drive splines...avoid the nervous sweat and go buy a proper one ;) |
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