low rpm stumble
01-25-2003, 11:24 AM
#1
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Join Date: Jul 1998
Location: Los Angeles, CA
Posts: 197
low rpm stumble
mods are in the sig + home ported heads
I have this %*(@ low rpm stumble that doesn't go away. I finally replaced my burnt plug wires, etc. Opti is not that old, etc.
If I try to go steady with a rpm between 1500 and 2000, it feels like I can't get teh engine to rev smoothly, there is always some kind of stumble every other second or so
Any ideas?
I have this %*(@ low rpm stumble that doesn't go away. I finally replaced my burnt plug wires, etc. Opti is not that old, etc.
If I try to go steady with a rpm between 1500 and 2000, it feels like I can't get teh engine to rev smoothly, there is always some kind of stumble every other second or so
Any ideas?
01-25-2003, 11:36 AM
#2
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Join Date: Oct 2002
Location: il
Posts: 69
this happened to me after i put new wires on the pulley cut through new wire and i got miss so check and make sure all wires are not cut or anything then check to make sure the wires are on spark plug all the way and plugged into opti all the way
01-25-2003, 12:31 PM
#4
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Join Date: Dec 1999
Location: Petersham, MA
Posts: 1,697
Definately sounds ignition related. Check and recheck all the plugs and wires. When you're done, have a friend check them too. I know it's a pain in the @$$, but so is the plug/wire setup on our cars!
01-25-2003, 01:05 PM
#5
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Join Date: Jun 2002
Location: Florida
Posts: 34
Sounds just like plug wires to me. I've got a couple of burnt wires that need to be replaced. I'm going over the valve covers this time. Burnt wires gets old when you have to keep replacing them. The pulley cut one as well.
Not sure if this is completely related but I think I have a small vacuum leak too. When the car is cold it idles fine, but within a few minutes the RPMs go up to 1500. Then the burnt wires cause the missing problem. One of the other stupid things I did was get the #6 & #8 wires reversed on the opti... this feels like a burnt wire miss too. Crappy gas mileage is a result of either so check everything 3 times just to make sure. Tie everything up and away from everything... (over the valve covers).
Hope all goes well,
Mescaline
Not sure if this is completely related but I think I have a small vacuum leak too. When the car is cold it idles fine, but within a few minutes the RPMs go up to 1500. Then the burnt wires cause the missing problem. One of the other stupid things I did was get the #6 & #8 wires reversed on the opti... this feels like a burnt wire miss too. Crappy gas mileage is a result of either so check everything 3 times just to make sure. Tie everything up and away from everything... (over the valve covers).
Hope all goes well,
Mescaline
01-25-2003, 06:17 PM
#6
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Thread Starter
Join Date: Jul 1998
Location: Los Angeles, CA
Posts: 197
I just replaced the wires with over the valve cover wires, which solved lots of the misses I had, etc. The plugs are pretty new either.
Oil and coolant are fine. It happens all the time consistantly.
I didn't think about the vacuum leak though, but why would it only be at one RPM?
Here's the typical symptom: get on a flat road, any gear at 1500 rpm or so and steady gas: it looks like the rpm climbs a little bit then goes down regularly. Actually now that I think of it, it's more like a surge than a stumble but it's hard to describe. It's like at regular interval I was changing the gas for a split second
Oil and coolant are fine. It happens all the time consistantly.
I didn't think about the vacuum leak though, but why would it only be at one RPM?
Here's the typical symptom: get on a flat road, any gear at 1500 rpm or so and steady gas: it looks like the rpm climbs a little bit then goes down regularly. Actually now that I think of it, it's more like a surge than a stumble but it's hard to describe. It's like at regular interval I was changing the gas for a split second
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