Help please!
Thread Starter
Teching In
Joined: Jul 2011
Posts: 38
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Help please! Ok guys I did a cam and injector swap on my 98 Trans AM. I put in a comp cam 235/249 .575/.559 109lsa. 42# Precision injectors. (Stock intake and throttle body). After the cam install I didn't have my injectors yet so I put it together with my stock injectors and my old tune. Car started right up and sounded awesome! I send pcm off for a mail order tune and put my injectors in and when I go to start it she idles very rough and wont start without pressing on the throttle.
Since then I have tried drilling the butterfly with no luck, changed IAC valve, swapped TPS, and even got another butterfly with stock hole and nothing changes how it runs. It is very rich and smokes up the shop. The new plugs have already fouled and I put in my old plugs (which where almost new) and nothing changes it.
I called my tuner and he says its something wrong with the car and not the tune. Oh btw originally I had bought a different set of injectors and he said it was probably the injectors (they were cheap ebay ones). Changed those and no change. I didn't change the MAF sensor but I did unplug it when it was running and it instantly died... if that means anything?? I was going to check the vacuum but my gauge has a smaller port and I need to buy an adapter. It carries about 58lbs of fuel pressure when it is running.
I know this is a long list but I have no idea where to turn. I have considered buying HP Tuners and trying to find out how to adjust things myself with some help. Any help would be very much appreciated!
Since then I have tried drilling the butterfly with no luck, changed IAC valve, swapped TPS, and even got another butterfly with stock hole and nothing changes how it runs. It is very rich and smokes up the shop. The new plugs have already fouled and I put in my old plugs (which where almost new) and nothing changes it.
I called my tuner and he says its something wrong with the car and not the tune. Oh btw originally I had bought a different set of injectors and he said it was probably the injectors (they were cheap ebay ones). Changed those and no change. I didn't change the MAF sensor but I did unplug it when it was running and it instantly died... if that means anything?? I was going to check the vacuum but my gauge has a smaller port and I need to buy an adapter. It carries about 58lbs of fuel pressure when it is running.
I know this is a long list but I have no idea where to turn. I have considered buying HP Tuners and trying to find out how to adjust things myself with some help. Any help would be very much appreciated!
