won"t get up and go

Reply Subscribe

Thread Tools

Search this Thread

Nov 4, 2002 | 10:20 PM

85 vette

Thread Starter

Navigator

Joined: Oct 2002

Posts: 9

Likes: 0

From: aurora co

won"t get up and go

its the first day above freezing in a week decided to tinker with the car! i went through the tech tips finally got her idoling better (850 in stead of 1300) i adjusted the tps to .55 couldn"t get it right at .54 unpluged the iac like the directions say. went for a test drive if you nail it from a stand still it will bog down and even died once right now the timming is a 6deg i tried timming anywhere from 2 up to 10 and it still bogs. i won"t be driving her this winter but would like to have her all fixed up for spring!!!!

could this be from the knock sensor not being hooked up?

Nov 4, 2002 | 11:55 PM

needanother1

Racer

Joined: Jul 2002

Posts: 269

Likes: 0

From: Paris AR, USA

Re: won"t get up and go (85 vette)

It doesn't sound like a problem that would be caused by the knock sensor circuit to me, especially if it's disconnected.

You are disconnecting the EST bypass connector while setting base timing, aren't you?

You need to check your fuel pressure. Do you have the SES light on? Codes set? Sounds like fuel pressure/injector problem, or MAF problem.

Jason

Nov 5, 2002 | 05:03 AM

ol,RJ

Burning Brakes

Joined: Sep 2000

Posts: 1,199

Likes: 1

From: NewCastle IN. USA

Re: won"t get up and go (85 vette)

did you use the "voltage" setting on your multimeter when setting the TPS? (I mistakenly used OHM's one time, ran like crap when I stepped on it).

Nov 6, 2002 | 01:43 AM

85 vette

Thread Starter

Navigator

Joined: Oct 2002

Posts: 9

Likes: 0

From: aurora co

Re: won"t get up and go (ol,RJ)

i was thinking fuel pressure (to much or not enough!) when i tried to get codes the light doesn"t come on at all, ijumped the top right two is that correct? yes i disconnected the est wire but after i shut the car off plug it back in and start the car the computer takes the timming up off the scale. maybe a bad computer? :confused:

Nov 6, 2002 | 10:45 AM

needanother1

Racer

Joined: Jul 2002

Posts: 269

Likes: 0

From: Paris AR, USA

Re: won"t get up and go (85 vette)

Does the SES light turn on when the key is on without the engine running?

If yes:

You should be able to jumper the two upper, right-hand side terminals with the ignition on and engine stopped to get a code 12--- one flash--two flash---
If you don't, you've probably got a bad chip or a bad computer. My '88 service manual says that you should "replace the mem-cal (chip) only after trying a replacement ECM, as a defective mem-cal is an unlikely cause of this problem."

Nov 6, 2002 | 01:15 PM

JCAIRE2

Le Mans Master

Joined: Jun 2002

Posts: 6,097

Likes: 0

From: High Plains Drifter Fayetteville, AR

Re: won"t get up and go (needanother1)

Check lightbulb in dash first. Some owners pull them due to codes, and they don't want to look at the SES light all the time, so I would check the bulbs first.

J :seeya

Nov 7, 2002 | 12:19 AM

85 vette

Thread Starter

Navigator

Joined: Oct 2002

Posts: 9

Likes: 0

From: aurora co

Re: won"t get up and go (JCAIRE2)

thanks for the info! this is probably something stupid i"m just overlooking

Nov 7, 2002 | 09:20 AM

vettmech

Drifting

Joined: Feb 2000

Posts: 1,994

Likes: 0

From: Charleston, WV

Re: won"t get up and go (85 vette)

You may want to veridy your timing marks too.......... these balancers slip sometimes and the marks could be off. The knock sensor would have helped if anything ......... and the timing will go off the scale that's there because you should have LOTS of advance with it plugged in........ I don't remember for sure but I thought 85s were supposedly timed at 8 before..... not 6....... but I don't think 2 degrees will affect it THAT much. :seeya