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The reason I asked about the timing is because I think I recall, I think, that when I reconnected the EST the timing at idle did not move. I will recheck, that. And thank you for the info with respect to the fuel pump. I will have to change it. I really do think it is fuel supply. thank you

First of all thank you for the help. I tried to balance the TBIs but used the wrong vacuum port and kept drinking up all my fluid, doh! ass far as the ignition system. The cap an rotor have about 500 miles on them and the wires have about 1500 miles on them. and the mark is in the correct place...

Plug wires are good. What is the timing on the 84 Corvette at 3000 rpm. I am thinking that because my timing light has the advance knob I can set it to that number and bring the car to 3000 rpm. This way I can check the advance at high rpm, correct?

So this is how stupid I am. The dial on the back of my timing light was not on zero. this is now the second time I forgot to check that. The other time I remembered before having a panic attack. But I am still breaking up over 3000 rpm. I am thinking that I need new injectors. I am thinking of...

My 1984 4 plus 3 is bogging above 3000 rpm. So I checked the fuel pressure. It is above 15 psi. So decide to check the timing. I have some small misses at idle. But the car idles at 700 rpm when it is warmed up and frankly runs good. So I put a timing light and cannot find the mark. I shut the...

fuel pump So I solved the problem. What I did was put a plunger switch from battery to the fuel pump. So now I turn the key and press the switch. The car starts instantly. I di this because I had used my ohm meter and determined that my grounds were good and that there is no shorts. Yet the...

I looked at the ECM codes. I got a 15 coolant temperature. My radiator fan keeps blowing the 3 amp fuse. I changed the relay, motor. I thought that when I grounded the switch wire the fan would run but it does not. I tried to trace the wires. The blue switch wire, which has power until the fan...

I went to the shop manual and did not find a fuel pump test. I do not know how to change the calibration As for the porting degrading the air flow I do not think that is the case. The car always had a little hesitation and only had 16" of vacuum at idle. Now I have 20" of vacuum at idle. And a...

I own a 1984 4 plus 3 Corvette. It is stock except I ported the intake. It was running well and sometimes it seemed to hesitate. Today I was driving it and it hesitated and stalled. I called a tow but got home with some clutch riding and a little luck. Oh I disconnected the EGR. I replaced the...

Hello Everybody I own a bone stock 1984 Corvette with 4 plus three. The car has 72,000 miles on it. Recently I was driving it and it started to surge. Then the gas milage went from 18 mpg to 4 mpg and then continued to surge throughout my drive. Eventually consuming 4 gallons of gas in about 10...

syncronizing the TBIs Bill, I have a 1984 Crossfire with manual Transmission. What port do I use to connect to the manometer. So what I am understanding is I connect the manometer to the TBI. With the car at idle, warmed up and the timing set. Ar ethe IAC's, TPS and Electronic Spark...

Hi Stefan, Yes I did remove the air box and I am sure that when the car is running the injectors are working properly. What I am trying to find out is are the injectors supposed to pulse when the key turns on, or even with the spark from the initial cranking of the engine. Does anyone have a...

Hello, I am new to this forum. In Feb this year I bought a 1984 Corvette with 4 spd manual transmission. the car is stock. I have replaced the fuel pump and fuel filter. The car starts up on one to three cranks. But, it will not warm start. When it is running for a while and I shut it off I...