Fresh 5.8 sluggish
Fresh 5.8 sluggish
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Freshman User
Joined: Apr 2007
Posts: 30
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I posted a few weeks ago. I had the wrong cam installed. Cam has 110 lobe sep. It should have 114. 1993 5.8 on speed density. Rebuilt the engine stock on the bottom. The heads and intake are Alum Edl. BBK throttle body. 3 inch exhaust, high flow cat. K&N cold air. 410 poss. front and rear diffs. EFOD trans with shift kit. Tires are 50R20.
I was going to change out the cam. Then I was told I could keep the cam, save on some labor, but get the tweecer. The tweecer works out "Cheaper" than pulling everything out to change the cam and lifters. The cam I have isn't huge, but it's not computer friendly. I'm told the Tweecer will allow me to program and account for the cam. I'm still running stock injectors. I'm told I don't need larger.
Done and replaced every sensor imaginable. TPS replaced, checked and tested.
It runs good, I just feel like she has more to offer. Has anyone run a tweecer? I'm thinking It's worth a shot. Feedback?
I was going to change out the cam. Then I was told I could keep the cam, save on some labor, but get the tweecer. The tweecer works out "Cheaper" than pulling everything out to change the cam and lifters. The cam I have isn't huge, but it's not computer friendly. I'm told the Tweecer will allow me to program and account for the cam. I'm still running stock injectors. I'm told I don't need larger.
Done and replaced every sensor imaginable. TPS replaced, checked and tested.
It runs good, I just feel like she has more to offer. Has anyone run a tweecer? I'm thinking It's worth a shot. Feedback?
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
the tweecer is a hard tuning program to use. your best bet would be to locate someone on the lightning forums that could make you a base tune which you would infact need the tweecer. have you been to the tweecer website yet? have you checked to make sure you speed density ecu can even be tuned with tweecer because not all can
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Joined: Jun 2003
Posts: 3,550
Likes: 72
From: Calhoun GA
I use SCT software to tune mine and I can tell you that you can't tune around a mechanical problem. With that lobe separation, my guess is that the motor is not producing enough vacuum at lower RPM's. A mass air swap can manage a cam like that, or you could change the cam out to something that is a little more speed density friendly.
The Tweecer is a little challenging to use indeed, but it is a good tuning tool. If you decide to use it to dial in your combo (once you get the cam issue ironed out), there is a website where current users can help with tuning strategies and there may be someone that can share a file with you. Just make sure you do plenty of reading, ask questions and be patient.
The Tweecer is a little challenging to use indeed, but it is a good tuning tool. If you decide to use it to dial in your combo (once you get the cam issue ironed out), there is a website where current users can help with tuning strategies and there may be someone that can share a file with you. Just make sure you do plenty of reading, ask questions and be patient.
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Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
you would also want the tweecer R/T version which is probably the same cost as getting the proper cam installed
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Joined: Jun 2003
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From: Calhoun GA
I'd ask around first before forking out the extra $$ for the R/T version. There have been reported problems with that version and some EEC-4 truck ECU's. There are other scan tools that will work though; EASE and Autotap are two that I can think of. They cost more but they're extremely useful for DIY tuning.
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Joined: Apr 2007
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I checked the EASE and Autotap but they both look like they are all about OBD11. I have a 93 OBD1. I purchased the Autoxray Code Scout 2500. Time and time again it read Unable to read codes. I'd like to read the codes before I purchase a reprogram product.
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Joined: Jun 2003
Posts: 3,550
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From: Calhoun GA
They work with 1 & 2. I use EASE on my 94 and it works well; it displays/plot and records 43 different engine and (auto) transmission values on you laptop. It'll also does KOER/KOEO and cylinder balance tests. The other models should to much of the same thing as well.
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