Ok, before i changed the Coolent Temp Sensor, my car would stall on cold mornings, as it would idle at 600 RPMs, and until it warmed up, it would drive kinda funny when first taking off, it would start right away when cold though. but when the engine is warm, i noticed it would take alot longer to start, well now that i replaced the Coolent temp sensor, the car will start perfect in the morning, and idle at 900 RPM's till warm, and the warm starts are quicker then before. i think my gas milage might of went up, but i have yet to fill up and check, but hardley ever do i get past 200 miles on a tank, and im at 199 now!! but anyways, if ur having cold and warm start problems, i recomend replacing coolent temp sensors, the ones in the front of the engine that is.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

http://www.geocities.com/david_angel_16

 

David, I ran into the same problem and it's amazing how much the CTS controls. My understanding is most of the tables in the computer rely on accurate engine temperature readings. Bad readings cause the computer to do really stupid things

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Rob P
89RSconvtZZ4TPI Edelbrock Intake
SLP Dual Cold Air Intake 1 5/8" Headers Semi-Siamesed Runners, IROC
suspension, alum shaft. Numerous mods.
92Z28convt5spd (stock)
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

i too have the hot starting problems. i might replace the CTS before i replace the injectors.

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86',88',89' IROC-Z, 350 TPI, 700-R4

94' Formula, LT1, 6spd



[This message has been edited by mystikkal_69 (edited October 28, 2001).]

 

Does anyone know where the coolant teperature sensor is located?? on a TPI f-body???

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1988 Camaro Iroc-z
305 ci Tuned Port 700R4
3" Exhaust/Flowmaster 80 series muffler/Dynomax high flo cat
hypertech chip/k&n filters
Cut out MAF screens
TPIS Airfoil
"Camaros RULE!!"
"Theres no replacement for displacement"
SAVE THE F-BODY!!!!

 

Dont know if anyone knows, but I do.

Its in the front of the intake manifold, right next to the cold start switch. Has 2 wires, one yellow one black.

 

cold start switch? whats that? my car takes forever to start in morning maybe thats it.

 

if u have an 89, then u don't have one. but i still recomend chaning ur CTS, for 89+, the ECM enriches all injectors instead of just using the cold start injector when needed.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series Muffler added to Unkown CatBack, Ported Intake

http://www.geocities.com/david_angel_16

 

I'm plagued with starting problems too on my 88 GTA L98. I'm stumped. Spins like crazy, but just doesn't want to fire up, and idles really low 450-500 rpm's. Last night I changed my idle control sensor and it did absolutely nothing. It still idles completely flat at 450-500 all the time, and continues to be difficult to start. In addition, my car routinely runs up to 220-235 degrees when I'm stop moving. Last night I tested the fans and they kick on at about 230, and kick back off when it gets down to 220. Car runs strong when temp stays below 210, but when it gets above 210, especially when it gets above 220 it surges, and feels like the timing is extremely retarded. Also my knock sensor triggered the check engine light. I changed the sensor between the last two spark plugs on the passenger side of the block thinking that was the sensor that tells the fans what temp they should come on, but they still activate at 230. (I have an 87 IROC L98 and my fans come on at about 180 on it, so I robbed that sensor of it for the GTA. It didn't change anything. What should I do about the temp issue and difficult starting problem?


[This message has been edited by Steve1 (edited November 28, 2001).]

 

did u replace the CTS? also, the cold start temp sensor is on the fron of the engine, to the right of the CTS, and it has a bigger connector, that might also help cold starts, and there is another temp sensor on the Drivers side between the 1st and ?? cylinders. have u changed ur thermostat and make sure ur coolent system is running good? 210* is an average running temp with stock therm and fan switch.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series Muffler added to Unkown CatBack, Ported Intake

http://www.geocities.com/david_angel_16

 

ok this is what i WAS going to email u but decided to post here incase i left out something....

the fan temp sensor is on the DRIVERS side and the knock sensor is on the passenger side. you might goto Pepboys and pick up a 180* or 160* thermostat and a fan switch that turns the fans on at a lower temp, either an adjustable one, or one that turns it on around 195* (or if u don't feel like putting in a new thermostat then pick up a regular replacement fan switch).. im not too good at fan wiring and such, but i am pretty sure its a direct hook up from the fan switch to the fan.

but i highly recomend changing ur Coolent temp sensor if u haven't already, my car still has a problem with stalling after the first start, or unless i give it gas, BUT, as soon as it catches or gets restarted, it idles at 1100 when its 35* outside and goes down to 500 once warmed up, while before it did the same thing as urs.

good luck

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series Muffler added to Unkown CatBack, Ported Intake

http://www.geocities.com/david_angel_16