Posted: Sat Feb 06, 2010 9:12 pm Post subject: Car jolts in 1st/ 2nd when I let off the gas.
Hey dudes. As the tittle says, when i get to maybe >1800rpm in 1st then let off the gas my car jolts back and forth like crazy. This happens in 2nd at around >26000rpm.
The only way not to look like an idiot in slow traffic is to work up in 1st then quickly slam the clutch in when traffic begins to go even slower. Or go from 1st into second and travel in second at literally 700rpm.
I'm going to check this out next time its warm, i justed wanted to get some feedback/ advice in the mean time.
Maybe a vacuum line leak?
Thanks,
Travis
LOWETGT
Joined: Jun 04, 2009 Posts: 2678 Location: N. Illinios
Posted: Sat Feb 06, 2010 9:22 pm Post subject:
Check the intake tube, If it cracks the engine runs poorly with unmetered air leak. Maybe when engine torques over to a point, it opens a crack in the tube causing issue. Many just duct tape it up...
travism91
Joined: Apr 07, 2009 Posts: 58
Posted: Sat Feb 06, 2010 9:30 pm Post subject:
Say, i find a crack or two, plug/tape them up, and it still jolts in lower gears when not applying the gas. What else could it be?
LOWETGT
Joined: Jun 04, 2009 Posts: 2678 Location: N. Illinios
Posted: Sat Feb 06, 2010 9:33 pm Post subject:
Bad IAC or TPS?
ciento44
Joined: Jan 10, 2009 Posts: 1402 Location: Indianapolis
Posted: Mon Feb 08, 2010 9:42 am Post subject:
Looked at your motor mounts recently?
_________________ 1990 Mazda MX6 GT: Torque steering, tire-shredding, flame-blowing daily. 13.27@118mph 1992 Toyota Celica GT: Suited, booted, strapped, braced, gutted, slammed, rolled race car
1993 Ford Escort GT: Crystal's car
silverton
Joined: Mar 30, 2006 Posts: 2719 Location: Seattle, WA
Posted: Mon Feb 08, 2010 11:20 am Post subject:
ciento44 wrote:
Looked at your motor mounts recently?
+1
But a buddy just had a problem similar to this, so my vote is cracked intake pipe. The pipes have a tendency to split where it accordions. I used silicone to fix the one I had in my car.
_________________ -Dennis
1991 Escort GT - 214k with a savage knock.
1995 Pathfinder XE - 188k and counting
Bomdoutscort Paying Member
Joined: Jan 01, 2003 Posts: 804 Location: Cincinnati, Ohio
Posted: Mon Feb 08, 2010 12:15 pm Post subject:
Intake pipe problem probably
_________________
travism91
Joined: Apr 07, 2009 Posts: 58
Posted: Mon Feb 08, 2010 7:00 pm Post subject:
The tps is less than 3 months old, iac was cleaned before winter.
I usually have to grind the hell out second if the rpms are higher from 1st(3000rpm). Which ruins the fun of the shortest gear
Can you associate bad motor mounts with gear grinding? How easily are these repaired? Should a Newb like me spend money on a mechanic?
LOWETGT
Joined: Jun 04, 2009 Posts: 2678 Location: N. Illinios
Posted: Mon Feb 08, 2010 7:39 pm Post subject:
Bad motor mounts and bad shifter bushing could cause issues with shifting. I had one sloppy has heck once and I had no issues though...
ciento44
Joined: Jan 10, 2009 Posts: 1402 Location: Indianapolis
Posted: Tue Feb 09, 2010 7:18 am Post subject:
travism91 wrote:
The tps is less than 3 months old, iac was cleaned before winter.
I usually have to grind the hell out second if the rpms are higher from 1st(3000rpm). Which ruins the fun of the shortest gear
Can you associate bad motor mounts with gear grinding? How easily are these repaired? Should a Newb like me spend money on a mechanic?
Yeah, motor mounts could definitely cause that.
A newb like you shouldn't spend money on a mechanic to replace motor mounts, or anything mentioned in this thread. They're all easy.
_________________ 1990 Mazda MX6 GT: Torque steering, tire-shredding, flame-blowing daily. 13.27@118mph 1992 Toyota Celica GT: Suited, booted, strapped, braced, gutted, slammed, rolled race car
1993 Ford Escort GT: Crystal's car
Dave94LX Moderator
Joined: Nov 01, 2007 Posts: 4638 Location: Under the Stairs
Posted: Tue Feb 09, 2010 7:45 am Post subject:
yes, my 99 had an issue with grinding if I would try to go into 3rd gear at high RPMs. I knew my motor mounts were original, so I decided to install some Energy suspension motor mount inserts. I haven't had an issue with gear grinding since.
_________________ "Post count does NOT equal knowledge"
94 LX SPI
99 SE
07 Yaris Sedan
08 Grand Caravan
racethisescort89
Joined: Oct 28, 2008 Posts: 1684 Location: Brampton Ontario canada
Posted: Tue Feb 09, 2010 12:56 pm Post subject:
Dave would u recommend these inserts to someone like me?
Joined: Jan 10, 2009 Posts: 1402 Location: Indianapolis
Posted: Tue Feb 09, 2010 1:14 pm Post subject:
Most people like them, and in theory, they're a great product.
I haven't had good luck with them, but there's a chance that all three vehicles i've had with them installed had other issues contributing to the engine movement.
_________________ 1990 Mazda MX6 GT: Torque steering, tire-shredding, flame-blowing daily. 13.27@118mph 1992 Toyota Celica GT: Suited, booted, strapped, braced, gutted, slammed, rolled race car
1993 Ford Escort GT: Crystal's car
Dave94LX Moderator
Joined: Nov 01, 2007 Posts: 4638 Location: Under the Stairs
Posted: Tue Feb 09, 2010 1:41 pm Post subject:
As long as your ok with more vibrations, then go for it. Both of my cars vibrate at idle, which doesn't bother me. They also are snappy off the line, and go through all gears really well.
For the price, they have worked well for me.
_________________ "Post count does NOT equal knowledge"
94 LX SPI
99 SE
07 Yaris Sedan
08 Grand Caravan
racethisescort89
Joined: Oct 28, 2008 Posts: 1684 Location: Brampton Ontario canada
Posted: Tue Feb 09, 2010 2:06 pm Post subject:
my car ROCKS like HELL when i let off the gas i can physically move my front mount with my hand like the rubber inside im thinking of making a solit mount somehow but i may try these to see how they work
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