munki Posted May 1, 2006 Report Share Posted May 1, 2006 (edited) Hi everyone I'm having an interesting issue with a ke70 i purchased for my girlfriend. under load (i.e only driving up the mountain where i live) the car will loose all power and the car will begin to make a lagre hissing noise (almost like large air compressor cannot pinpoint if this is coming out the exhaust or the engine bay). The car will also heat up slightly but stays within the "normal" range on the guage. on pulling over the car will run very slightly rough but then correct itself within 20 seconds or so. after losing power and reaching the top the car will drive normally and wont do it again until under a consistant high load. the problem has got me stumped some of you may have noticed my thread on toymods but I'm hoping for some more specific answers from the corolla specialists :P the car starts and drives excellently and is the smoothest k motor i have driven in. It has excellent even compression both wet and dry and shows no signs of a blown headgasket, blowby or any other problems associated with major engine failures. The car is a genuine 1 owner with 108000kms. ok so here is what i have done to the car so far chasing the problem new leads new toyota plugs new points set gap and dwell new fuel filter new air filter checked primart fuel line for blockages: none aparent completly dismantled carby checked and cleaned jets, venturies and all passages: no blockages carby was immaculatly clean reset float level was slightly low raised it to slightly high: (may have caused problem to be less frequent however may have been my imagination.) cried when i saw the vacume mess that is toyota emc :) i am unsure where to go next with this problem i have disconnected the spaghetti connected to the vacume advance and run a direct line to it, i have yet to try this yet though. Any help from the gurus or those that have experienced similar problems would be appriceated thanks in advance Daniel. Edited May 1, 2006 by munki Quote Link to comment Share on other sites More sharing options...
slapper Posted May 1, 2006 Report Share Posted May 1, 2006 no brillyint ideas from me just yet ... but add "check timing, particularly centrifugal advance and vacuum retard" to your list. when it dies under load, does it happen immediately you hit the hill or what? If you floor it on the straight and level, what happens? Going up the hill - is there a right foot setting that will have it climb the hill steadily but not accelerate? If so, how does it feel when you gradually press the go pedal from this point? Try the hill without the air-cleaner ... is the hissing different? Whilst idling, try partially blocking the exhaust with a thick rag ... is the hissing different? Lift the idle to 1500 or so - ... partially block the snorkel on the air cleaner ... is the hissing differenht? This sounds like a right pain in the arse! Slapper Quote Link to comment Share on other sites More sharing options...
Robert Posted May 1, 2006 Report Share Posted May 1, 2006 A good trick to check for a leaking intake manifold is to start the car and let it idle (don't do this with a hot engine) and get a garden hose to trickle water around the inlet and exhaust manifold where it joins on to the block. If the car coughs and splutters you found your leak. You can also do this with Carby cleaner Quote Link to comment Share on other sites More sharing options...
thomo Posted May 1, 2006 Report Share Posted May 1, 2006 sounds like a hair line crack in the dissy cap to me Quote Link to comment Share on other sites More sharing options...
munki Posted May 1, 2006 Author Report Share Posted May 1, 2006 Thanks for the replys everyone the distributer seems to work as normal with a consistant advance when free reving the motor. there is strong vacume to the diaphram however i would like to swap over the vacume advance for another one. the car doesnt have a set point where it dies just relative to the load put on the engine i guess. the motor shows no problems or noises when free reving however that may not rule out a manifold leak i will try the methods susgested. The cracked cap sounds like something i may have overlooked as i was told it was replaced only a month before i purchased the car. the cap is a bosch but its quality and fitment is very average, i was suprised as bosch usually make a quality product. i may look into a genuine cap. I have taken the car and given it a bit along different terrains and i can replicate the problem on a flat road from a standing stop the noise will come about in 3rd gear but the power doesnt seem to be too effected. This leads me to it being more of a fueling issue perhaps the fuel pump is not supplying consistant fuel pressure to the carby? could a small hole in the diaphram only effect it when it has to perform at a higher level? anyways thanks for the susgestions i will try them asap i would like to get it running nicely for my girlfriend :P Daniel. Quote Link to comment Share on other sites More sharing options...
munki Posted May 3, 2006 Author Report Share Posted May 3, 2006 Hey all thanks for the all the susgestions the problem is solved! The muffler was rusted out inside and as a result it must have been pulling chunks of packing and blocking the flow. so a new muffler on and its fixed! Thanks Daniel. Quote Link to comment Share on other sites More sharing options...
Redwarf Posted May 3, 2006 Report Share Posted May 3, 2006 Well, there we go. There is one to store up in the memory! Thanks for coming back with the solution. R Quote Link to comment Share on other sites More sharing options...
slapper Posted May 4, 2006 Report Share Posted May 4, 2006 The muffler was rusted out inside and as a result it must have been pulling chunks of packing and blocking the flow. dang ... last place I would've looked! how'd you decide that was the problem? I guess rag over the exhaust may have helped to indicate exhaust blockage as causing the strange noises anyway? well done. Slapper Quote Link to comment Share on other sites More sharing options...
munki Posted May 6, 2006 Author Report Share Posted May 6, 2006 I remembered that my friend had a similar problem in his camry with his cat melting and cloging the exhaust system. So i shook the muffler and of course it rattled. A quick call to an exhaust shop confirmed that this could be the problem :) the rest is history Daniel. Quote Link to comment Share on other sites More sharing options...
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