[LiasLegend]

Today I had the bright idea of installing the Venom 400 in my car.

I went over the instructions at LegendTuner.com and also those included in the kit and the electrical connections were made correctly.

I took my car out for a ride after and everything was fine.

I just went to get some gas and I am not happy. With the system on my car idles very erradic and if I don't give it enough gas the car stalls. With the system off it idles much better but it won't move and the check engine light comes on.

What did I damage and how much will it cost to fix?

 

[KeithQNguyen]

Lias,

Just try driving your car for a few days, the ECU will correct itself and should turn off the light. If a week passes go to a local mech. and ask them to reset your ECU.....They should do it for free..... Good luck --=Keith

 

[ChrisK]

I agree. Give it time. But first, just make sure your ground to the Venom unit is a really good secure ground. Also, if you removed your battery to do this installation, I suggest you reset the ECU, leace the Venom 400 off, and and idle the car like that for a few minutes. I don't believe in that drive it hard after you reset the ECU trick either. I get best result after resetting the ECU if I let the car idle. After the car runs well, turn on the Venom and see how it works. Also note, the Venom doesn't work well at all when the car is cold. The car has a cold run parameters where it enriches fuel to help warm up the car faster, so engaging the Venom during this time causes an overly rich condition.

By the way, I never had any problems like you had with your Venom, and no matter what people say about the unit, I can feel the differnce on my 6-Speed, especially in 3rd and 4th gears. In 1st and 2nd, the gears are strong enough stock, so I can't really tell any significant difference, and 5th and 6th gears are just too tall for any significant acceleration differences anyway.

 

[LiasLegend]

Thanks guys... I hope that does the trick.

The car has a cold run parameters where it enriches fuel to help warm up the car faster, so engaging the Venom during this time causes an overly rich condition.

- ChrisK would that result in the exhaust fumes being visible and having a noticeable odor?

 

[LiasLegend]

I reset the ecu and it was a little better. At least I could drive it with Venom off. It's certainly not like it used to be... it doesn't know when to shift and I think it forgot about Over Drive(yes I have an auto) and if I push the issue the check engine light comes on and the car stalls.

It now idles at around 300rpm

I drove it around town and also on the high way to try to get a sense of how I'm going to adjust my driving habits. I drove for about 30 miles and then I decided to switch the Venom on.

With it on my power was restored and I could feel a difference(in a good way). Although I have to start it 2 or 3 times because it likes to stall. It idles between 0 and 300rpms. If I accelerate hard up a hill it seems fine, however if I left up and then try to resume it barely accelerates... I guess not a big deal because I can down shift and then it responds.

I'll give it some more time but I can't shake the feeling that this is going to cost me a lot to fix.

 

[Ben Hedrington]

Hmmm

This has me itching to reply but I don't know much about our setup as far as throttle goes but...

Could you have somehow changed the throtle position sensor or displaced the throttle wire? If you disconnect the Venom negative ground it shouldn't start at all and it should be back to normal right? Are little things like your PCV connected? Try a vaccum test if you can maybe you took a hose off to get to something and if is affecting things? Look for bare wires incarse you accidentally cut something.

Thats all I can thing of right now, I just did a tear down and rebuild of a V6 Mustang and these kind of little thing can set you back a mile sometimes.

-Ben

 

[LiasLegend]

Ben, thanks for the reply.

I guess anything is possible... I did unplug several wire clusters.

I'll double check what you've suggested when I get home today.

I've been wondering if one of the splicers, provided in the kit, did more than just splice.

What I can't get over is the first time I tested it, it worked fine. My car worked normally whether Venom was on or off.