Engine stumbles and sometimes at idle it surges and stalls.

by Jonathan Lester
(Ft Lauderdale, FL)

I replaced the module and distributor pickup with new ones and it got worse than it was before with the old ones. On acceleration during normal takeoff it stumbles and actually cuts of and on and then goes like hell when I stomp it. At the time it stumbles the tach also jumps. I can duplicate it at 1200 to 1500 rpm in neutral with no A/C on and car not moving. I double checked all connection on the distributor and coil and all plug wires. The reason I replaced the Pickup and module was because when hot the engine kept stalling at idle and it kept surging if it did not but it was OK after it cooled down for an hour or so. That problem is gone now but the new one I mentioned is driving me nuts.

Thanks for any help you can give me.


1990 Corvette 5.7 vin 8 Convertable 6 speed standard.

P.S. I also noticed under diagnostic the ignition timing read out seems to jump around more than it should and car runs worse when cold.

Comments for Engine stumbles and sometimes at idle it surges and stalls.

Average Rating starstarstarstarstar

Click here to add your own comments

Feb 15, 2016
Found problem
by: Jonathan Lester

I had replaced both the pickup and the module and after much checking I decided to put the old module back in and leave the pickup and try it again. It runs great now and the problem of stalling when hot and surging hot was cured with the Pickup. When it got hot the resistance would change and when it cooled down a bit it was OK again. Fixed no and I am going to send back the module for a replacement.


Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to C4 Corvette Ask!.

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.
Chris Trautman @ Corvette Assembly Plant 2019

About Us: Corvette Web Central | Owner Bio: Chris Trautman

Established in 2008 by Chris Trautman, Corvette Web Central quickly grew into one of the top leading Corvette enthusiast websites globally. 

"This website is a passion of mine, just as much as being a Corvette owner," says Chris.  He was frustrated trying to find information on the internet about Corvettes which was was not biased or influenced somehow. 

He has owned three Corvettes over the last twenty years and does not plan to stop owning one anytime soon.

Note: Some links on this page are part of our affiliate program and provide a small portion of proceeds to fund the administrative costs and to fund more product reviews.  We are not paid to perform the reviews or are we given any products for free.  

You might like these