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running rich

  1. 1989 mustang lx running rich. help needed.

    5.0L Tech
    Hey guys I just recently did a nice little motor build but I'm having some problems ironing out the little details. lets start with the build went from stock 302 to .20 over bore, edelbrock performer rpm heads, ported and polished pro comp intake, trick flow cam: intake lift .542". intake...
  2. 1999 GT Problem !! Need help

    4.6L Tech
    Hi, I have a 1999 Mustang GT (4.6L v8, Automatic), Im having problems on several things: 1- Problems when doing a cold start, I must try several times or accelerate it to achieve it, and some times it backfires on the start. 2 - GAS mileage in the toilet, literally. 3 - When I accelerate it...
  3. 87 mustang motor swap problems

    5.0L Tech
    Just bought a 87 mustang 5.0 that had overheating issues so I swapped in a 89 5.0 and got it running but it smokes black smoke and is running rich. The original motor had a smog pump deleted so I don't know what's sensors have been removed or what changes with that. The original motor also used...
  4. 408 Stroker Running Pig Rich Under Load

    Classic Tech
    I sure could use a little help/encouragement, I have recently returned my mustang out of non op status here in lovely Cali. As I did this I have upgraded my ignition and carburetor. I bought a used Holley HP 950 on Ebay. When it arrived I put it on the car and fired it up to take it for a...
  5. Need help with Fox Body 5.0 gt

    5.0L Tech
    I recently purchased a 5.0 gt and the car has a few issues. Most notably It runs rich and has a rough idle (without the MAF sensor plugged in), When the MAF sensor is plugged in the car dies of and stops running. Ive gont through the fuel system with new injectors, regulator and fuel filter. and...
  6. Hello ,1995 Mustang GT

    Introductions
    I have a 1990 mustang gt 5.0. Theres a couple diffrent problems after running engine about 30 seconds the headers start to glow because they are so hot. Next theres a whistle coming from somewere in the engine compartment an every minute or so the intake seems the I like theres a pop noise...
  7. Help! Black Smoke + Fuel Leak

    5.0L Tech
    I have an 88 GT (recently acquired). Was running good, but now, smokes something fierce. In addition, I've driven it all of 50 miles since I bought it around Thanksgiving, put a full tank in it, and now it's on Empty! (Can't see any visible leaks / puddles of fuel under the car when it's...
  8. 1986 Mustang GT Vacuum line confusion

    5.0L Tech
    Hello. I started my car for the first time today in over two months (just got my license back) and it was running super rich. I looked on the forums for an answer and it seemd after just replacing my injectors I could be looking at a bad MAP sensor. Yes I realize I should have checked that...
  9. 1987 Mustang 5.0 GT running rich. Any Ideas?

    5.0L Tech
    I have a 1987 Mustang GT 5.0L Convertible. Its needed a lot of love at this point just to keep running and I've still got a long way to go, among the many things on the list to get fixed is that its running rich. I'm not sure why its running rich and to be honest I'm not completly sure where to...
  10. Car has high idle and running VERY rich. Any Ideas?

    5.0L Tech
    Hi I have a 1987 Mustang GT Convertible 5.0 and I have a Problem. When my car is in idle it is very high and the car is running real rich. I just replaced my valve covers and my upper intake gasket cover and I fixed the vacum lines that were leaking. I'm not sure why my car is running so high in...
  11. 2.3l 4 plug running VERY rich

    2.3L Tech
    well a couple of weeks ago i noticed that it was running rich and the idle rpm has always been kinda high like 1400 or so so i adjusted it down to about a grand and it still ran rich... i thought the o2 sensor and the MAF worked in sync to adjust fuel/air ratios but i am also getting a check...
  12. 2004 Mustang GT running extremely rich

    4.6L Tech
    I have an 04 gt running rich and I only get about 17mpg. I've had the car about 6months, it only has 60,xxx miles on it, but its running extremely rich. I think it did sit for a few months before I bought it. I've done all I know to do, I put a CAI on it because the factory filter smelled like...
  13. 2004 Mustang gt running rich

    4.6L Tech
    I have an 04 gt running rich and I only get about 17mpg. I've had the car about 6months, it only has 60,xxx miles on it, but its running extremely rich. I think it did sit for a few months before I bought it. I've done all I know to do, I put a CAI on it because the factory filter smelled like...
  14. 89 5.0 running problems

    5.0L Tech
    hello, to begin with i just got my mustang back recently from a mechanic, swapped the block because mine was cracked due to an idiot who didnt put antifreeze back after flushing radiator, anyway i get the car back and its running very rich, so rich it burns your eyes cant stand to drive the car...
  15. 1989 mustang gas problems

    5.0L Tech
    hello my mustang has recently had the block replaced because the old one was busted, swapped heads, intake, etc., onto the new block which i was told was an 88, after i got the car back from the mechanic it is running very rich while idling and driving, and idles up longer than it should on...
  16. Is my 5.0 Not Tuned Right?

    5.0L Tech
    I changed the thermostat a few days ago and put the stock 195* thermostat in and it runs really cool. It runs at about the "O" in "NORMAL" when it is about 72* out here in California. However, the problem is that I feel like it has lost some power. It has been running rich for the past two...
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