Spark Plug Issue possible?
Thread Starter
5th Gear
Joined: Jul 2017
Posts: 5
Likes: 0
From: Chandler AZ
Spark Plug Issue possible?
I have a 94 C4 LT1 six speed manual, I change the battery to a Optima Deep Cycle battery and noticed a diffrence in power. Now my car sputters when fully gas it in 4th-6th gear. In six gear the car will feel like the engine is shaking a little and hesitating and not getting enough power. I can not gas it fully I must gradutely give it gas then the car will accerlate, but the like before. Is this a spark plug issue?
Melting Slicks
Joined: Sep 2008
Posts: 2,376
Likes: 110
From: Cherokee National Forest TN
Maybe new to manual trans use? I think you may be lugging the engine = not enough engine rpm for the amount of throttle applied.
Suggest 2000 rpm minimum for full throttle apply in 4th & 5th or downshift.
6th is a cruise/gas mileage gear don't use it until 65mph if the road is flat. If hilly leave it in 5th.
Suggest 2000 rpm minimum for full throttle apply in 4th & 5th or downshift.
6th is a cruise/gas mileage gear don't use it until 65mph if the road is flat. If hilly leave it in 5th.
Last edited by Churchkey; Jul 19, 2017 at 08:44 AM.
Safety Car
Joined: Aug 2013
Posts: 4,421
Likes: 601
From: Minneapolis Mn
I really don't think a different battery should cause the issues noted as long as you're making a good electrical contact between the cables and battery plus the battery is charged up.
Now something I have seen before is the ridge on the cables prevented a good contact between the cable connection and the battery. Quick test that worked for me was getting a couple of thin copper washers that went between the cable and battery to insure that the thing wasn't bottoming out prior to a good connection. Takes just a few minutes and it's either good or not.
Just a thought.
Now something I have seen before is the ridge on the cables prevented a good contact between the cable connection and the battery. Quick test that worked for me was getting a couple of thin copper washers that went between the cable and battery to insure that the thing wasn't bottoming out prior to a good connection. Takes just a few minutes and it's either good or not.
Just a thought.
Safety Car
Joined: Aug 2013
Posts: 4,421
Likes: 601
From: Minneapolis Mn
Melting Slicks
Joined: May 2013
Posts: 2,692
Likes: 349
From: Sacramento California
Maybe new to manual trans use? I think you may be lugging the engine = not enough engine rpm for the amount of throttle applied.
Suggest 2000 rpm minimum for full throttle apply in 4th & 5th or downshift.
6th is a cruise/gas mileage gear don't use it until 65mph if the road is flat. If hilly leave it in 5th.
Suggest 2000 rpm minimum for full throttle apply in 4th & 5th or downshift.
6th is a cruise/gas mileage gear don't use it until 65mph if the road is flat. If hilly leave it in 5th.
By the comments, your problem may be elsewhere but I wanted to chime in.
Le Mans Master
Joined: Feb 2000
Posts: 9,058
Likes: 214
From: Epping NH
Changing a battery isn't going to cause the car to have engine problems unless during the change you somehow managed to short out the ECM. Check to see if you're getting any codes.
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Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
Maybe new to manual trans use? I think you may be lugging the engine = not enough engine rpm for the amount of throttle applied.
Suggest 2000 rpm minimum for full throttle apply in 4th & 5th or downshift.
6th is a cruise/gas mileage gear don't use it until 65mph if the road is flat. If hilly leave it in 5th.
Suggest 2000 rpm minimum for full throttle apply in 4th & 5th or downshift.
6th is a cruise/gas mileage gear don't use it until 65mph if the road is flat. If hilly leave it in 5th.
If I stay off gas pedal I can get over 30 mpg. I think if I had a 100 miles of level road, I could get over 40+mpg @ 35-40 mph.