My mechanic friend said that my 91 tbi gives more gas when the car is cold and less as it heats up or something like this. He said there is a way to hook up a switch to keep the cold start fuel pressure on when you want it on. Is there any truth to this? My car always feels alot faster when I first fire it up

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91' red RS convert.
71,000 miles
89' IROC hood
red Z-28 16" rims
potenza re730's
MSD ignition
MSD coil
K&N fiter
350 ported polished heads
hypertech chip
flowmaster 40 series cat-back

 

You can unplug the CTS (coolant temp sensor) and jump the connector terminals with a 640 ohm resistor causing the ECM to 'think' the car is only running about 145-150°. This fooling the ECM into 'thinking' it's not quite warmed up yet will let it allow more advance & fuel.

Words of caution, some cars rely on the CTS to turn the fan on, and detonation is more likely to occur (even more if you use low test/octane gas) since the ECM on percives the engine as cold when realistically, it's at operating temp.

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