help me out with a weird hesitation in the motor.
02-27-2002, 10:17 AM
#1
help me out with a weird hesitation in the motor. after my new rearend was installed ( i dont think it has anything to do with it though), i now have a hesitation in the motor at around 1500-2000 rpms - like the timing is being cut out. now if i put my foot in it, there is no hessitation. the gears just blow the rpms up there. it is only if i slowly ride the clutch out and not try to spin the tires that i get this "falling on its face" feel.can anyone help me out? i dont think it is bad gasoline or too lean of a condition since it is so cold outside right now, even with my MAF ends. i dont know if it is the clutch of ignition issue. i checked the plug wires and visually everything LOOKS like it is connected and getting good spark. help me out guys. like i said WOT and there is NO hessitation. only when i baby it.
oh and it is through 1-4 gears when it bogs down. thanks. i am puzzled.
oh and it is through 1-4 gears when it bogs down. thanks. i am puzzled.
02-28-2002, 11:46 AM
#5
Re: help me out with a weird hesitation in the motor. it is like the motor bogs down at around 1500 rpms in all gears. but once it gets out of that 1500-2000 range it pulls like a **** (esp with the new gears). it is as soon as i release the clutch around 1300 - then it goes and then bogs. again, if i nail it, the tires just go up in smoke. it just has a problem with this range. could it be clutch related? it is not disengaging soon enough? does it sound like a spark issue? or is it a MAF issue? i just dont know where to look right now. it totally sucks
thanks and word to my Asian herd!
thanks and word to my Asian herd!
02-28-2002, 03:55 PM
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Re: help me out with a weird hesitation in the motor. When I was running open headers briefly, the extra air was causing problems with the O2 sensors, which caused the car to run extremely rich. I experienced this same phenomenon (sputter at low RPM's). Once I got the exhaust pipes on, the problem went away. Maybe you're running a little rich?
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02-28-2002, 09:42 PM
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Re: help me out with a weird hesitation in the motor. REMEMBER! O2's Compare the outside AIR OF THE 02 to the INSIDE exhaust 02. Smoke or what ever on ur pipes will effect O2 readings. Hope this helps. <img src="graemlins/gr_judge.gif" border="0" alt="[judgement]" /> <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />
03-01-2002, 03:21 PM
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Re: help me out with a weird hesitation in the motor. Do you have stock programming with the Hotcam? The thing you're describing kinda sounds like what my car does.(got the same cam)Part throttle feels like the car is hesitating.
03-01-2002, 05:37 PM
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Re: help me out with a weird hesitation in the motor. we had a small problem that sounds like ours, it was getting water in the brain.after covering it (cleaned out the warer first)with a old rubber floor mat it's fine . michael
03-04-2002, 07:27 PM
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Re: help me out with a weird hesitation in the motor. MY hotcam has the SAME hesitation your talking about. hmmmm sounds like a weak point maby? Like the hotcam doesnt like part throtle?
03-04-2002, 07:52 PM
#15
Re: help me out with a weird hesitation in the motor. well i dont really think it is the hot cam as i never noticed it untill i got the new rearend with bigger gears. i have had it dynoed and never noticed a problem. my HP and TQ curves were very flat and nice. are you running a ported MAF? i might try changing that out, but i dont think it is that. never had a problem and have done nothing to the motor since the gears.
03-04-2002, 08:57 PM
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Re: help me out with a weird hesitation in the motor. Well same here Just got on the dyno last month. No problems anywhere. I've yet to get the rear. Its on its way. BUT it does feel like it Kicks in all of a sudden like something loose in the drive train.... Does your car surge when under LIGHT throtle going slo like 15 mph in 2nd?
03-04-2002, 09:02 PM
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Re: help me out with a weird hesitation in the motor. No stock MAF. Hey one thing funny though. My pinion gear just broke. Thats why I ordered the Rear. From Mark in fact <img src="gr_images/icons/wink.gif" border="0"> . But tell you what it the new rear Fixes it ill be shure to let you know. Might help on the process of elimination.
03-04-2002, 10:01 PM
#18
Re: help me out with a weird hesitation in the motor. well first, congrats on the new rear from mark. you will be very happy. he has great prices and puts orders in right away.
as for the car, the surging, i used to get, but then i drilled my TB blade hole just this weekend (after the hessitation started). i drilled it to 15/64" and it is about gone. a very good easy mod to do to get rid of the bucking and surging. and i did not think it had to do with the MAF. my car still runs rich with the ported ends.
does anyone think that it is just that i am used to now the rush of the bigger gears and it just seems like hessitation in my head? i really think it is real. damn. just going to have to autotap it to see if i am getting full ignition.
as for the car, the surging, i used to get, but then i drilled my TB blade hole just this weekend (after the hessitation started). i drilled it to 15/64" and it is about gone. a very good easy mod to do to get rid of the bucking and surging. and i did not think it had to do with the MAF. my car still runs rich with the ported ends.
does anyone think that it is just that i am used to now the rush of the bigger gears and it just seems like hessitation in my head? i really think it is real. damn. just going to have to autotap it to see if i am getting full ignition.
03-04-2002, 10:56 PM
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Re: help me out with a weird hesitation in the motor. I KNOW mine surges. Has for months now. An i run Scanmaster everyday. Never noticed a chage in timing during it? Guess ill have to look closer!
Good idea hopefully ill have more tomarrow then
Edit: Oh yea about the serging. No its a diffrent kind (i think) it does surge up and down at idle when its cold of defrost on something like that no biggie. But it fees lke the car is loose like it bucks at slow speeds. Always thought it was loosness in the gears. But after i opend it up and found the Broke teeth it wasnt loose it actually felt too tight? hmmm
[ March 04, 2002: Message edited by: Tim 98z ]</p>
Good idea hopefully ill have more tomarrow then
Edit: Oh yea about the serging. No its a diffrent kind (i think) it does surge up and down at idle when its cold of defrost on something like that no biggie. But it fees lke the car is loose like it bucks at slow speeds. Always thought it was loosness in the gears. But after i opend it up and found the Broke teeth it wasnt loose it actually felt too tight? hmmm
[ March 04, 2002: Message edited by: Tim 98z ]</p>
03-05-2002, 09:38 AM
#20
Re: help me out with a weird hesitation in the motor. well tim, mine (like nearly every big intake duration cam with a 112 LSA) surges at start up especially with cold weather - from 400 - 1000 rpms. it is like the computer is trying to search or find a happy place. this is normal for those that have not drilled the TB blade hole. once i did that, i have not experienced the "searching" at all. no bucking (like a loose gear) or anthing. it does idle a bit higher at first since there is mor air letting through. this is the easy fix with bigger cams.
as still for this problem, i dont understand why no one has chimed in. i hope you take a look at the scanmaster. i dont know about scanmaster, but on autotap, i would look at timing throughout the rpm (esp at the hessitation range) and knock retard. let me know if you figure anything out for me. we need to figure it out!
as still for this problem, i dont understand why no one has chimed in. i hope you take a look at the scanmaster. i dont know about scanmaster, but on autotap, i would look at timing throughout the rpm (esp at the hessitation range) and knock retard. let me know if you figure anything out for me. we need to figure it out!