Help; with no power!!!!!!1994
Thread Starter
Heel & Toe
Joined: Feb 2007
Posts: 23
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From: front royal va
Help; with no power!!!!!!1994
Background, I posted two weeks ago, my daughter blew her engine in the 1994 vette. I purchased a Jasper engine for it and finally got everything back together, I also purchased the installtion kit which included water pump, distributor, all new hose, sensors, belts etc. so it is like a brand new engine. It will start right up and idle fine, but then I have no throttle, it just dies on me. I have double checked the timing, check the exhaust to ensure it was not blocked. I get no codes etc, I am scratching my head on this one. I would like some suggestions on what I might try or might have over looked.
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current situation, car starts and idels fine, but it does not have any power when you give it gas.. today, I took off the water pump and double, double checked the opti spark and the timing is correct. I have check all sensor to ensure I did not plug one in wrong. I have checked the fuel lines to make sure they are not resticting the fuel. I have checked the TSP to ensure I have 0-5 volts. I would like some new ideals on what to checkout next. tks in advance.
Don
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current situation, car starts and idels fine, but it does not have any power when you give it gas.. today, I took off the water pump and double, double checked the opti spark and the timing is correct. I have check all sensor to ensure I did not plug one in wrong. I have checked the fuel lines to make sure they are not resticting the fuel. I have checked the TSP to ensure I have 0-5 volts. I would like some new ideals on what to checkout next. tks in advance.
Don
Racer
Joined: Apr 2005
Posts: 408
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I've seen this happen with a 4.3 engine in a bravada, after much money spent by the "stealership" on things that were not wrong, it turned out to be a ground for the pcm that was intermittent. I would check all of your grounds for proper contact with a meter.
Race Director
Joined: Dec 2006
Posts: 10,383
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Some other thoughts...
A failure in any of these could cause the comp not to know that it needs to increase fuel or adjust timing.
A malfunctioning torque converter clutch solinoid can cause the engine to die similar to a manual clutch being dumped at low speed.
Does the tach work? If so, what is the current idle RPM? Do RPMs increase at all before it dies?
Is the huge vacuum line to the power booster in good shape?
- TPS sends its signal (0.5 volts to 5.0 volts) to the TPS module, located near the surge tank passenger side. TPS module generates a signal for the PCM. A scan tool will show throttle position 0% at idle 100% at WOT.
- MAP sensor, located on the passenger side of the block near the throttle body, sends its signal to PCM and should detect a change in manafold pressure if there are no serious vacuum leaks.
- MAF measures the flow rate and sends its signal to PCM to adjust fuel and timing.
A malfunctioning torque converter clutch solinoid can cause the engine to die similar to a manual clutch being dumped at low speed.
Does the tach work? If so, what is the current idle RPM? Do RPMs increase at all before it dies?
Is the huge vacuum line to the power booster in good shape?
